根据什么条件来判断用什么检验统计量呢？

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.

$z=\frac{\mathrm{46,760}-\mathrm{46,435}\mathrm{}}{1370\mathrm{}/\sqrt{64}}=1.8978$