The amount of money spent on food per week by an American family is known to have a mean of $92 and a standard deviation of $9. Suppose a random sample of 81 families is taken and their sample mean food expenditure is calculated.
Find the mean of the sampling distribution of .
______________
Find the standard deviation.
______________
Find the probability that the sample mean does not exceed $90.40.
______________

Question

The amount of money spent on food per week by an American family is known to have a mean of $92 and a standard deviation of $9. Suppose a random sample of 81 families is taken and their sample mean food expenditure is calculated.
Find the mean of the sampling distribution of  .
______________
Find the standard deviation.
______________
Find the probability that the sample mean does not exceed $90.40.
______________

Quizplus · Accepted Answer

The Answer of The amount of money spent on food per week by an American family is known to have a mean of $92 and a standard deviation of $9. Suppose a random sample of 81 families is taken and their sample mean food expenditure is calculated.
Find the mean of the sampling distribution of  .
______________
Find the standard deviation.
______________
Find the probability that the sample mean does not exceed $90.40.
______________

The Amount of Money Spent on Food Per Week by an American