The mean of the dstrilution of sample moarn is Type an intoer or a dcima ) (Roun

Question

The mean of the dstrilution of sample moarn is Type an intoer or a dcima ) (Round to two docimal places as eooded) It the sample size is n-38, find the mean and standud deviation of the dstibution of sample means The mean of the dstnbution of sample moars is(lype an integer or a decimal) OA The mean stays the same, but the standard deviation decreases O B. The mean and the standard deviation both increase ° C. The mean stays the same, be the standard devat on increases O D. The mean and the standand deviation both decrease

Explanation / Answer

for sample size n=25;

mean of distribution of sample means =7.7

std deviaiton=0.34/sqrt(25)=0.07

for sample size n=38;

mean of distribution of sample means =7.7

std deviaiton=0.34/sqrt(38)=0.06

option A is correct ; mean stays the same but the std devition decreases.

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