請問各位s.d 點計 . . 需詳細 . .
class Interval Midpoint Frequency
57-59 58 6
54-56 55 7
51-53 52 11
48-50 49 9
45-47 46 7
42-44 43 6
39-41 40 4
N= 50
Mean = 49.72
Standard deviation = ??
怎樣計算出 standard deviation ?
2007-01-15 10:31 pm
回答 (1)
2007-01-15 11:07 pm
✔ 最佳答案
stadard deviation=positive square root of the following number xx =( 6x(58-49.72)^2+7x(55-49.72)^2+11x(52-49.72)^2+9x(49-49.72)^2+7x(46-49.72)^2+
6x(43-49.72)^2+4x(40-49.72)^2)/50
standard deviation=5.3180(corr. to 4 d.p.)
參考: Mathematics In Action 5B
收錄日期: 2021-04-13 16:28:57
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070115000051KK01727