求解答點樣計 我唔識計就來要考試?
回答 (1)
2019-01-01 4:27 pm
z-scores for 84.68% =z-scores for (84.68-50)%=34.68%
check the table for the z-scores for 0.3468 =1.023
z-scores for 11.82%=z-scores for (50-11.82)%=38.18%
check the table for the z-scores for 0.3818=1.184
we have (m-2261)/s = 1.023 -----(1)
(2453-m)/s=1.184-------(2)
(1)+(2):
-2261+2453=2.207s
s=87
sub s=87 into (1)
m-2261=1.023*87
m=2350
check the table for the z-scores for 0.3468 =1.023
z-scores for 11.82%=z-scores for (50-11.82)%=38.18%
check the table for the z-scores for 0.3818=1.184
we have (m-2261)/s = 1.023 -----(1)
(2453-m)/s=1.184-------(2)
(1)+(2):
-2261+2453=2.207s
s=87
sub s=87 into (1)
m-2261=1.023*87
m=2350
收錄日期: 2021-04-23 22:10:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20181226141053AA7SDtV