根據(jù)臺灣壽險(xiǎn)業(yè)的資料,男性從0歲、1歲、…到60歲各年齡層的死亡率
(單位:%)依序?yàn)?br />1.0250,0.2350,0.1520,0.1010,0.0720,0.0590,0.0550,0.0540,0.0540,0.0520,
0.0490,0.0470,0.0490,0.0560,0.0759,0.1029,0.1394,0.1890,0.2034,0.2123,
0.2164,0.2166,0.2137,0.2085,0.2019,0.1948,0.1882,0.1830,0.1799,0.1793,
0.1813,0.1862,0.1941,0.2051,0.2190,0.2354,0.2539,0.2742,0.2961,0.3202,
0.3472,0.3779,0.4129,0.4527,0.4962,0.5420,0.5886,0.6346,0.6791,0.7239,
0.7711,0.8229,0.8817,0.9493,1.0268,1.1148,1.2139,1.3250,1.4485,1.5851,
1.7353.
經(jīng)初步整理后,已知61個資料中共有24個資料小于0.2.請問死亡率資料的中位數(shù)為下列哪一個選項(xiàng)?
(1)0.2034   (2)0.2164   (3)0.2137   (4)0.2085   (5)0.2019.
【答案】分析:要求一組數(shù)據(jù)的中位數(shù),這組數(shù)據(jù)有61個,得到中位數(shù)是這些數(shù)字的最中間一個,已知61個數(shù)據(jù)中有24個數(shù)據(jù)小于0.2,故只須從大于或等于0.2的數(shù)據(jù)中找出第7個,把數(shù)據(jù)寫出得到結(jié)果.
解答:解:61個數(shù)據(jù)的中位數(shù)為第31個數(shù)據(jù)(須先將所有數(shù)據(jù)由小排到大)
由題目已知61個數(shù)據(jù)中有24個數(shù)據(jù)小于0.2,
故只須從大于或等于0.2的數(shù)據(jù)中找出第7個.
大于或等于0.2的資料排列如下:
0.2019,0.2034,0.2051,0.2085,0.2123,0.2137,0.2164,
故中位數(shù)為0.2164
故死亡率資料的中位數(shù)為(2)
點(diǎn)評:本題考查一組數(shù)據(jù)的中位數(shù),若所給的數(shù)據(jù)有偶數(shù)個,則中位數(shù)是最中間兩個數(shù)字的平均數(shù),若數(shù)據(jù)由奇數(shù)個,則中位數(shù)是最中間一個數(shù)字,本題是一個基礎(chǔ)題.
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6、根據(jù)臺灣壽險(xiǎn)業(yè)的資料,男性從0歲、1歲、…到60歲各年齡層的死亡率
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根據(jù)臺灣壽險(xiǎn)業(yè)的資料,男性從0歲、1歲、…到60歲各年齡層的死亡率
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(1)0.2034   (2)0.2164   (3)0.2137   (4)0.2085   (5)0.2019.

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