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Hugo(Xie Lanzhi) · 2020年01月01日

问一道题:NO.PZ2015120604000134

问题如下:

Ida Lee and his team collect a lot of  statistical data about the car market .According to the data, they come to the conclusion that the mean  price of SUV is more than $46,435 in his country.  Then they randomly select 64 SUVs whose mean price is $46,760. Assume the standard deviation of the population is 1370. Ida Lee conducts a hypothesis test to check their conclusion. What is the value of the calculated test statistic?

选项:

A.

4.2348

B.

1.8978

C.

1.5848

解释:

B is correct.

z= 46,76046,435 1370/ 64 =1.8978

麻烦您自己算一下,根据这个算式,(46470-46435)/(1370/8)等于多少?我怎么算的跟答案里面的对不上?

1 个答案
已采纳答案

星星_品职助教 · 2020年01月01日

同学你好,

这里面的计算式应该是(46760-46435)/(1370/8)=1.8978,第一项不是“46470”哈