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大老王 · 2020年02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

想问下这道题的公式出自哪里呢,可否帮直接粘贴一个上来,多谢!

1 个答案

星星_品职助教 · 2020年02月03日

同学你好,

这道题考察的是假设检验的第二步,计算检验统计量。