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Unimodality

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1277: 764: 1272:{\displaystyle {\frac {\left|{\frac {q_{\alpha }+q_{(1-\alpha )}}{2}}-\mu \right|}{\sigma }}\leq \left\{{\begin{array}{cl}{\frac {{\sqrt{{\frac {4}{9(1-\alpha )}}-1}}{\text{ }}+{\text{ }}{\sqrt{\frac {1-\alpha }{1/3+\alpha }}}}{2}}&{\text{for }}\alpha \in \left{\frac {3\alpha }{4-3\alpha }}}{\text{ }}+{\text{ }}{\sqrt{\frac {1-\alpha }{1/3+\alpha }}}}{2}}&{\text{for }}\alpha \in \left({\frac {1}{6}},{\frac {5}{6}}\right)\!,\\{\frac {{\sqrt{\frac {3\alpha }{4-3\alpha }}}{\text{ }}+{\text{ }}{\sqrt{{\frac {4}{9\alpha }}-1}}}{2}}&{\text{for }}\alpha \in \left(0,{\frac {1}{6}}\right]\!.\end{array}}\right.} 51: 76: 477:. The Chebyshev inequality guarantees that in any probability distribution, "nearly all" the values are "close to" the mean value. The Vysochanskiï–Petunin inequality refines this to even nearer values, provided that the distribution function is continuous and unimodal. Further results were shown by Sellke and Sellke. 65: 2276:
Gauss C.F. Theoria Combinationis Observationum Erroribus Minimis Obnoxiae. Pars Prior. Pars Posterior. Supplementum. Theory of the Combination of Observations Least Subject to Errors. Part One. Part Two. Supplement. 1995. Translated by G.W. Stewart. Classics in Applied Mathematics Series, Society for
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is unimodal, as well as any other distribution in which the maximum distribution is achieved for a range of values, e.g. trapezoidal distribution. Usually this definition allows for a discontinuity at the mode; usually in a continuous distribution the probability of any single value is zero, while
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are given below which are only valid for unimodal distributions. Thus, it is important to assess whether or not a given data set comes from a unimodal distribution. Several tests for unimodality are given in the article on
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If there is a single mode, the distribution function is called "unimodal". If it has more modes it is "bimodal" (2), "trimodal" (3), etc., or in general, "multimodal". Figure 1 illustrates
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Proving unimodality is often hard. One way consists in using the definition of that property, but it turns out to be suitable for simple functions only. A general method based on
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Another way to define a unimodal discrete distribution is by the occurrence of sign changes in the sequence of differences of the probabilities. A discrete distribution with a
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is the skewness. Klaassen, Mokveld, and van Es showed that this only applies in certain settings, such as the set of unimodal distributions where the mode and mean coincide.
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In 2020, Bernard, Kazzi, and Vanduffel generalized the previous inequality by deriving the maximum distance between the symmetric quantile average
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Klaassen, Chris A.J.; Mokveld, Philip J.; Van Es, Bert (2000). "Squared skewness minus kurtosis bounded by 186/125 for unimodal distributions".
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This bound is sharp, as it is reached by the equal-weights mixture of the uniform distribution on and the discrete distribution at {0}.
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Depending on context, unimodal function may also refer to a function that has only one local minimum, rather than maximum. For example,
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which has a single peak. The term "mode" in this context refers to any peak of the distribution, not just to the strict definition of
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A bimodal distribution. Note that only the largest peak would correspond to a mode in the strict sense of the definition of mode
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and quasiconcave functions extend the concept of unimodality to functions whose arguments belong to higher-dimensional
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One reason for the importance of distribution unimodality is that it allows for several important results. Several
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if a function is unimodal it permits the design of efficient algorithms for finding the extrema of the function.
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can be seen as unimodal, though for some parameters they can have two adjacent values with the same probability.
430: 130: 126: 99: 1341:), which indeed motivates the common choice of the median as a robust estimator for the mean. Moreover, when 1834: 435: 2111: 1930: 1683: 2242: 1877: 1849: 134: 458: 2463:. Lecture Notes in Computer Science. Vol. 3669. Berlin, Heidelberg: Springer. pp. 887–898. 2221:
D. F. Vysochanskij, Y. I. Petunin (1980). "Justification of the 3σ rule for unimodal distributions".
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Rohatgi, Vijay K.; Székely, Gábor J. (1989). "Sharp inequalities between skewness and kurtosis".
2259: 2181: 1344: 1285: 621: 1826:. An example of a weakly unimodal function which is not strongly unimodal is every other row in 1686:, the definitions above do not apply. The definition of "unimodal" was extended to functions of 2472: 2139: 2064: 2039: 103: 35: 2408: 1883: 1682:
As the term "modal" applies to data sets and probability distribution, and not in general to
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this definition allows for a non-zero probability, or an "atom of probability", at the mode.
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Sellke, T.M.; Sellke, S.H. (1997). "Chebyshev inequalities for unimodal distributions".
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One important property of unimodal functions is that the extremum can be found using
19:"Unimodal" redirects here. For the company that promotes personal rapid transit, see 2549: 2409:"On the unimodality of METRIC Approximation subject to normally distributed demands" 155:
In continuous distributions, unimodality can be defined through the behavior of the
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John Guckenheimer; Stewart Johnson (July 1990). "Distortion of S-Unimodal Maps".
2320:"Range Value-at-Risk bounds for unimodal distributions under partial information" 1687: 843: 414:{\displaystyle \dots ,p_{-2}-p_{-1},p_{-1}-p_{0},p_{0}-p_{1},p_{1}-p_{2},\dots } 27: 2304: 2042: 1753: 1616:
They derived a weaker inequality which applies to all unimodal distributions:
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Godfried T. Toussaint (June 1984). "Complexity, convexity, and unimodality".
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It can also be shown that the mean and the mode lie within 3 of each other:
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exists, but it does not succeed for every function despite its simplicity.
2289:"The Mean, Median, and Mode of Unimodal Distributions: A Characterization" 2067: 1838: 1764: 1544: 1540: 680:{\displaystyle {\frac {|\nu -\mu |}{\sigma }}\leq {\sqrt {\frac {3}{5}}}} 2468: 2541: 2514: 2263: 2177: 1730: 152:
Other definitions of unimodality in distribution functions also exist.
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Commentationes Societatis Regiae Scientiarum Gottingensis Recentiores
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It is worth noting that the maximum distance is minimized at
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of normal distributions, an example of unimodal distribution.
2457:"Optimizing a 2D Function Satisfying Unimodality Properties" 2318:
Bernard, Carole; Kazzi, Rodrigue; Vanduffel, Steven (2020).
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It can be shown for a unimodal distribution that the median
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Gauss also showed in 1823 that for a unimodal distribution
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International Journal of Computer and Information Sciences
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of a unimodal distribution are related by the inequality:
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A similar relation holds between the median and the mode
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Criteria for unimodality can also be defined through the
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Figure 2 and Figure 3 illustrate bimodal distributions.
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has exactly one sign change (when zeroes don't count).
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Vladimirovich Gnedenko and Victor Yu Korolev (1996).
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A.Ya. Khinchin (1938). "On unimodal distributions".
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A more general definition, applicable to a function
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for which it is weakly monotonically increasing for
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Chebyshev's inequality § Unimodal distributions
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being the mode. Note that under this definition the
1918: 1898: 1663: 1594: 1523: 1459: 1391: 1359: 1333: 1300: 1271: 750: 679: 578: 515: 413: 274: 2416:Method in appendix D, Example in theorem 2 page 5 2223:Theory of Probability and Mathematical Statistics 2136:Random summation: limit theorems and applications 1778:, from the fact that the monotonicity implied is 1763:functions with a negative quadratic coefficient, 1258: 1130: 986: 16:Property of having a unique mode or maximum value 2277:Industrial and Applied Mathematics, Philadelphia 516:{\displaystyle \sigma \leq \omega \leq 2\sigma } 275:{\displaystyle \{p_{n}:n=\dots ,-1,0,1,\dots \}} 2376: 2374: 2250:(1). American Statistical Association: 34–40. 2162:"On the unimodality of discrete distributions" 1693:A common definition is as follows: a function 8: 2455:Demaine, Erik D.; Langerman, Stefan (2005). 2293:Theory of Probability & Its Applications 269: 217: 2086: 2084: 2335: 1911: 1885: 1645: 1630: 1624: 1576: 1561: 1555: 1511: 1497: 1483: 1480: 1478: 1447: 1433: 1419: 1416: 1414: 1379: 1374: 1372: 1346: 1319: 1313: 1287: 1243: 1221: 1209: 1187: 1184: 1179: 1171: 1167: 1141: 1138: 1115: 1102: 1086: 1074: 1058: 1040: 1035: 1027: 1023: 997: 994: 965: 949: 937: 921: 903: 898: 890: 886: 852: 849: 846: 842: 795: 782: 775: 768: 766: 724: 711: 704: 702: 665: 651: 637: 634: 632: 558: 550: 536: 534: 493: 399: 386: 373: 360: 347: 331: 315: 299: 287: 224: 215: 1806:and weakly monotonically decreasing for 2030: 1759:Examples of unimodal functions include 1749:) and there are no other local maxima. 1983:)) is convex. Usually one would want 1770:The above is sometimes related to as 1539:Rohatgi and Szekely claimed that the 282:, is called unimodal if the sequence 183:, then the distribution is unimodal, 7: 2383:Statistics & Probability Letters 2353:Statistics & Probability Letters 2324:Insurance: Mathematics and Economics 133:. Among discrete distributions, the 2579:Theory of probability distributions 2436:"Mathematical Programming Glossary" 1814:. In that case, the maximum value 199:of the distribution or through its 1995:with nonsingular Jacobian matrix. 1858:successive parabolic interpolation 14: 1721:and monotonically decreasing for 92:unimodal probability distribution 46:Unimodal probability distribution 2337:10.1016/j.insmatheco.2020.05.013 157:cumulative distribution function 106:which is usual in statistics. 2287:Basu, S.; Dasgupta, A. (1997). 2166:Periodica Mathematica Hungarica 471:Vysochanskiï–Petunin inequality 465:Vysochanskiï–Petunin inequality 2099:(2). University of Tomsk: 1–7. 1498: 1484: 1434: 1420: 873: 861: 808: 796: 737: 725: 652: 638: 551: 537: 71:A simple bimodal distribution. 1: 2395:10.1016/S0167-7152(00)00090-0 2093:Trams. Res. Inst. Math. Mech. 1392:{\displaystyle {\sqrt {3/5}}} 2365:10.1016/0167-7152(89)90035-7 2160:Medgyessy, P. (March 1972). 1334:{\displaystyle q_{0.5}=\nu } 457:A first important result is 58:Probability density function 2117:Encyclopedia of Mathematics 1993:continuously differentiable 1360:{\displaystyle \alpha =0.5} 1301:{\displaystyle \alpha =0.5} 624:of each other. In symbols, 201:Laplace–Stieltjes transform 2595: 1952:is unimodal if there is a 620:lie within (3/5) ≈ 0.7746 607:root mean square deviation 452: 445: 34:means possessing a unique 18: 2305:10.1137/S0040585X97975447 208:probability mass function 1794:if there exists a value 1792:weakly unimodal function 1367:, the bound is equal to 131:exponential distribution 127:chi-squared distribution 100:probability distribution 2112:"Unimodal distribution" 2110:Ushakov, N.G. (2001) , 1944:) of a vector variable 1926:is the critical point. 1899:{\displaystyle x\neq c} 1835:local unimodal sampling 436:multimodal distribution 197:characteristic function 2574:Mathematical relations 2569:Functions and mappings 1931:computational geometry 1920: 1900: 1665: 1596: 1525: 1461: 1393: 1361: 1335: 1302: 1273: 752: 681: 580: 517: 473:, a refinement of the 415: 276: 83: 72: 61: 2495:Annals of Mathematics 2461:Algorithms – ESA 2005 2243:American Statistician 1999:Quasiconvex functions 1921: 1901: 1878:Schwarzian derivative 1850:golden section search 1767:functions, and more. 1666: 1597: 1535:Skewness and kurtosis 1526: 1462: 1394: 1362: 1336: 1303: 1274: 753: 682: 581: 518: 481:Mode, median and mean 416: 277: 159:(cdf). If the cdf is 135:binomial distribution 96:unimodal distribution 78: 67: 53: 2015:Bimodal distribution 1910: 1884: 1880:is negative for all 1761:quadratic polynomial 1729:. In that case, the 1623: 1609:is the kurtosis and 1554: 1477: 1413: 1371: 1345: 1312: 1286: 765: 701: 631: 533: 492: 475:Chebyshev inequality 286: 214: 189:uniform distribution 139:Poisson distribution 111:normal distributions 2469:10.1007/11561071_78 1780:strong monotonicity 690:where | . | is the 622:standard deviations 115:Cauchy distribution 40:mathematical object 2542:10.1007/bf00979872 2178:10.1007/bf02018665 2065:Weisstein, Eric W. 2040:Weisstein, Eric W. 1916: 1896: 1774:strong unimodality 1705:if for some value 1661: 1592: 1521: 1457: 1389: 1357: 1331: 1298: 1269: 1264: 748: 677: 576: 513: 459:Gauss's inequality 453:Gauss's inequality 411: 272: 84: 73: 62: 2497:. Second Series. 2478:978-3-540-31951-1 2020:Read's conjecture 1919:{\displaystyle c} 1846:search algorithms 1828:Pascal's triangle 1703:unimodal function 1678:Unimodal function 1653: 1584: 1516: 1506: 1452: 1442: 1387: 1251: 1224: 1217: 1211: 1200: 1182: 1174: 1169: 1166: 1123: 1110: 1089: 1082: 1076: 1073: 1038: 1030: 1025: 1022: 973: 952: 945: 939: 936: 901: 893: 888: 877: 833: 817: 746: 675: 674: 660: 568: 567: 148:Other definitions 2586: 2554: 2553: 2525: 2519: 2518: 2489: 2483: 2482: 2452: 2446: 2445: 2443: 2442: 2432: 2426: 2425: 2423: 2422: 2413: 2405: 2399: 2398: 2378: 2369: 2368: 2348: 2342: 2341: 2339: 2315: 2309: 2308: 2284: 2278: 2274: 2268: 2267: 2237: 2231: 2230: 2218: 2212: 2211: 2196: 2190: 2189: 2172:(1–4): 245–257. 2157: 2151: 2149: 2131: 2125: 2124: 2107: 2101: 2100: 2088: 2079: 2078: 2077: 2060: 2054: 2053: 2052: 2035: 2003:Euclidean spaces 1925: 1923: 1922: 1917: 1905: 1903: 1902: 1897: 1864:Other extensions 1776: 1775: 1670: 1668: 1667: 1662: 1654: 1646: 1635: 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560: 559: 554: 540: 522: 520: 519: 514: 469:A second is the 425:Uses and results 420: 418: 417: 412: 404: 403: 391: 390: 378: 377: 365: 364: 352: 351: 339: 338: 323: 322: 307: 306: 281: 279: 278: 273: 229: 228: 179: >  167: <  2594: 2593: 2589: 2588: 2587: 2585: 2584: 2583: 2559: 2558: 2557: 2527: 2526: 2522: 2507:10.2307/1971501 2492: 2490: 2486: 2479: 2454: 2453: 2449: 2440: 2438: 2434: 2433: 2429: 2420: 2418: 2411: 2407: 2406: 2402: 2380: 2379: 2372: 2350: 2349: 2345: 2317: 2316: 2312: 2286: 2285: 2281: 2275: 2271: 2256:10.2307/2684690 2239: 2238: 2234: 2220: 2219: 2215: 2198: 2197: 2193: 2159: 2158: 2154: 2146: 2133: 2132: 2128: 2109: 2108: 2104: 2090: 2089: 2082: 2063: 2062: 2061: 2057: 2038: 2037: 2036: 2032: 2028: 2011: 1908: 1907: 1882: 1881: 1866: 1773: 1772: 1713:increasing for 1680: 1626: 1621: 1620: 1557: 1552: 1551: 1537: 1482: 1475: 1474: 1418: 1411: 1410: 1369: 1368: 1343: 1342: 1315: 1310: 1309: 1284: 1283: 1263: 1262: 1236: 1232: 1219: 1192: 1186: 1152: 1144: 1140: 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CRC-Press. 2137: 2130: 2127: 2123: 2119: 2118: 2113: 2106: 2103: 2098: 2094: 2087: 2085: 2081: 2075: 2074: 2069: 2066: 2059: 2056: 2050: 2049: 2044: 2041: 2034: 2031: 2025: 2021: 2018: 2016: 2013: 2012: 2008: 2006: 2004: 2000: 1996: 1994: 1990: 1986: 1982: 1978: 1974: 1970: 1966: 1962: 1958: 1955: 1951: 1947: 1943: 1939: 1934: 1932: 1927: 1913: 1893: 1890: 1887: 1879: 1875: 1871: 1863: 1861: 1859: 1855: 1851: 1847: 1842: 1840: 1836: 1831: 1829: 1825: 1821: 1817: 1813: 1810: ≥  1809: 1805: 1802: ≤  1801: 1797: 1793: 1789: 1785: 1782:. A function 1781: 1777: 1768: 1766: 1762: 1757: 1755: 1750: 1748: 1744: 1740: 1736: 1732: 1728: 1725: ≥  1724: 1720: 1717: ≤  1716: 1712: 1711:monotonically 1708: 1704: 1700: 1696: 1691: 1689: 1685: 1677: 1675: 1658: 1655: 1650: 1647: 1642: 1639: 1636: 1631: 1627: 1619: 1618: 1617: 1614: 1612: 1608: 1589: 1586: 1581: 1578: 1573: 1570: 1567: 1562: 1558: 1550: 1549: 1548: 1546: 1542: 1534: 1518: 1513: 1508: 1503: 1494: 1491: 1488: 1473: 1472: 1471: 1454: 1449: 1444: 1439: 1430: 1427: 1424: 1409: 1408: 1407: 1405: 1400: 1384: 1380: 1376: 1354: 1351: 1348: 1328: 1325: 1320: 1316: 1295: 1292: 1289: 1259: 1254: 1248: 1245: 1240: 1237: 1233: 1229: 1226: 1214: 1205: 1202: 1196: 1193: 1189: 1176: 1162: 1159: 1156: 1153: 1148: 1145: 1131: 1126: 1120: 1117: 1112: 1107: 1104: 1098: 1094: 1091: 1079: 1069: 1066: 1063: 1059: 1055: 1050: 1047: 1044: 1032: 1018: 1015: 1012: 1009: 1004: 1001: 987: 982: 978: 975: 970: 967: 961: 957: 954: 942: 932: 929: 926: 922: 918: 913: 910: 907: 895: 882: 879: 870: 867: 864: 858: 854: 839: 835: 830: 826: 822: 819: 814: 805: 802: 799: 792: 788: 783: 779: 771: 761: 760: 759: 743: 734: 731: 728: 721: 717: 712: 708: 695: 693: 671: 668: 662: 657: 648: 645: 642: 627: 626: 625: 623: 619: 615: 610: 608: 604: 600: 596: 592: 573: 570: 564: 561: 555: 547: 544: 541: 529: 528: 527: 510: 507: 504: 501: 498: 495: 488: 487: 486: 480: 478: 476: 472: 464: 462: 460: 449: 441: 439: 437: 432: 424: 422: 408: 405: 400: 396: 392: 387: 383: 379: 374: 370: 366: 361: 357: 353: 348: 344: 340: 335: 332: 328: 324: 319: 316: 312: 308: 303: 300: 296: 292: 289: 266: 263: 260: 257: 254: 251: 248: 245: 242: 239: 236: 233: 230: 225: 221: 209: 204: 202: 198: 193: 190: 186: 182: 178: 174: 170: 166: 162: 158: 153: 147: 145: 142: 140: 136: 132: 128: 124: 123:-distribution 122: 116: 112: 107: 105: 101: 97: 93: 89: 81: 77: 70: 66: 59: 56: 52: 45: 43: 41: 37: 33: 29: 22: 2533: 2529: 2523: 2498: 2494: 2487: 2460: 2450: 2439:. Retrieved 2430: 2419:. Retrieved 2415: 2403: 2386: 2382: 2356: 2352: 2346: 2327: 2323: 2313: 2296: 2292: 2282: 2272: 2247: 2241: 2235: 2226: 2222: 2216: 2207: 2203: 2200:Gauss, C. F. 2194: 2169: 2165: 2155: 2135: 2129: 2115: 2105: 2096: 2092: 2071: 2058: 2046: 2033: 1997: 1988: 1984: 1980: 1976: 1972: 1971:) such that 1968: 1964: 1960: 1949: 1945: 1941: 1937: 1935: 1928: 1873: 1869: 1867: 1843: 1832: 1823: 1819: 1815: 1811: 1807: 1803: 1799: 1795: 1791: 1787: 1783: 1779: 1771: 1769: 1758: 1751: 1746: 1742: 1738: 1734: 1726: 1722: 1718: 1714: 1706: 1702: 1698: 1694: 1692: 1688:real numbers 1681: 1673: 1615: 1610: 1606: 1604: 1538: 1469: 1403: 1401: 1281: 696: 689: 617: 613: 611: 602: 598: 594: 588: 525: 484: 468: 456: 442:Inequalities 431:inequalities 428: 205: 194: 184: 180: 176: 168: 164: 154: 151: 143: 120: 108: 95: 91: 85: 79: 68: 54: 31: 25: 1868:A function 1754:derivatives 1690:as well. 32:unimodality 28:mathematics 2563:Categories 2441:2020-03-29 2421:2013-08-28 2150:p. 31 2043:"Unimodal" 2026:References 1954:one-to-one 589:where the 446:See also: 119:Student's 88:statistics 2491:See e.g. 2186:119817256 2122:EMS Press 2073:MathWorld 2048:MathWorld 1891:≠ 1733:value of 1684:functions 1643:≤ 1640:κ 1637:− 1628:γ 1574:≤ 1571:κ 1568:− 1559:γ 1509:≤ 1504:σ 1495:θ 1492:− 1489:μ 1445:≤ 1440:σ 1431:θ 1428:− 1425:ν 1349:α 1329:ν 1290:α 1230:∈ 1227:α 1223:for  1203:− 1197:α 1163:α 1157:− 1149:α 1095:∈ 1092:α 1088:for  1070:α 1051:α 1048:− 1019:α 1013:− 1005:α 958:∈ 955:α 951:for  933:α 914:α 911:− 880:− 871:α 868:− 836:≤ 831:σ 823:μ 820:− 806:α 803:− 784:α 735:α 732:− 713:α 663:≤ 658:σ 649:μ 646:− 643:ν 571:ω 556:≤ 548:μ 545:− 542:ν 511:σ 505:≤ 502:ω 499:≤ 496:σ 409:… 393:− 367:− 341:− 333:− 317:− 309:− 301:− 290:… 267:… 246:− 240:… 80:Figure 3. 69:Figure 2. 55:Figure 1. 2550:11577312 2330:: 9–24. 2229:: 25–36. 2009:See also 1991:) to be 1959:mapping 1948:is that 1906:, where 1848:such as 1839:extremum 1765:tent map 1709:, it is 1545:kurtosis 1541:skewness 2515:1971501 2264:2684690 1790:) is a 1731:maximum 1701:) is a 605:is the 173:concave 21:SkyTran 2548:  2513:  2475:  2262:  2184:  2142:  2068:"Mode" 1605:where 1181:  1173:  1037:  1029:  900:  892:  591:median 161:convex 2546:S2CID 2511:JSTOR 2412:(PDF) 2260:JSTOR 2182:S2CID 1741:) is 1659:1.488 601:and 98:is a 2473:ISBN 2140:ISBN 1543:and 526:and 175:for 171:and 163:for 137:and 129:and 104:mode 90:, a 36:mode 2538:doi 2503:doi 2499:132 2465:doi 2391:doi 2361:doi 2332:doi 2301:doi 2252:doi 2174:doi 1929:In 1856:or 1651:125 1648:186 1590:1.2 1355:0.5 1321:0.5 1296:0.5 593:is 94:or 86:In 26:In 2565:: 2544:. 2534:13 2532:. 2509:. 2471:. 2414:. 2387:50 2385:. 2373:^ 2355:. 2328:94 2326:. 2322:. 2297:41 2295:. 2291:. 2258:. 2248:51 2246:. 2227:21 2225:. 2206:. 2180:. 2168:. 2164:. 2120:, 2114:, 2083:^ 2070:. 2045:. 2005:. 1963:= 1860:. 1852:, 1841:. 1830:. 694:. 438:. 210:, 203:. 125:, 117:, 42:. 30:, 2552:. 2540:: 2517:. 2505:: 2481:. 2467:: 2444:. 2424:. 2397:. 2393:: 2367:. 2363:: 2357:8 2340:. 2334:: 2307:. 2303:: 2266:. 2254:: 2210:. 2208:5 2188:. 2176:: 2170:2 2148:. 2097:2 2076:. 2051:. 1989:Z 1987:( 1985:G 1981:Z 1979:( 1977:G 1975:( 1973:f 1969:Z 1967:( 1965:G 1961:X 1950:f 1946:X 1942:X 1940:( 1938:f 1914:c 1894:c 1888:x 1874:x 1872:( 1870:f 1824:x 1820:m 1818:( 1816:f 1812:m 1808:x 1804:m 1800:x 1796:m 1788:x 1786:( 1784:f 1747:m 1745:( 1743:f 1739:x 1737:( 1735:f 1727:m 1723:x 1719:m 1715:x 1707:m 1699:x 1697:( 1695:f 1656:= 1632:2 1611:γ 1607:κ 1587:= 1582:5 1579:6 1563:2 1519:. 1514:3 1499:| 1485:| 1455:. 1450:3 1435:| 1421:| 1404:θ 1385:5 1381:/ 1377:3 1352:= 1326:= 1317:q 1293:= 1260:. 1255:] 1249:6 1246:1 1241:, 1238:0 1234:( 1215:2 1206:1 1194:9 1190:4 1177:+ 1160:3 1154:4 1146:3 1132:, 1127:) 1121:6 1118:5 1113:, 1108:6 1105:1 1099:( 1080:2 1067:+ 1064:3 1060:/ 1056:1 1045:1 1033:+ 1016:3 1010:4 1002:3 988:, 983:) 979:1 976:, 971:6 968:5 962:[ 943:2 930:+ 927:3 923:/ 919:1 908:1 896:+ 883:1 874:) 865:1 862:( 859:9 855:4 840:{ 827:| 815:2 809:) 800:1 797:( 793:q 789:+ 780:q 772:| 744:2 738:) 729:1 726:( 722:q 718:+ 709:q 672:5 669:3 653:| 639:| 618:μ 614:ν 603:ω 599:μ 595:ν 574:, 565:4 562:3 552:| 538:| 508:2 406:, 401:2 397:p 388:1 384:p 380:, 375:1 371:p 362:0 358:p 354:, 349:0 345:p 336:1 329:p 325:, 320:1 313:p 304:2 297:p 293:, 270:} 264:, 261:1 258:, 255:0 252:, 249:1 243:, 237:= 234:n 231:: 226:n 222:p 218:{ 185:m 181:m 177:x 169:m 165:x 121:t 23:.

Index

SkyTran
mathematics
mode
mathematical object

Probability density function


statistics
probability distribution
mode
normal distributions
Cauchy distribution
Student's t-distribution
chi-squared distribution
exponential distribution
binomial distribution
Poisson distribution
cumulative distribution function
convex
concave
uniform distribution
characteristic function
Laplace–Stieltjes transform
probability mass function
inequalities
multimodal distribution
Chebyshev's inequality § Unimodal distributions
Gauss's inequality
Vysochanskiï–Petunin inequality

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