The average expenditures on food and drink for families is $5,700. Assume that the annual expenditure is normally distributed and that the standard deviation is $1,500.
A sample of 81 families is taken from the population described above. What is the probability that the average expenditures for these 81 families is less than $6,100?
I’m study for a test and this is an example problem so if I could see your work that would be so helpful! thanks!!!
