A day care program has an average daily expense of $75.00. The standard deviation is $15.00. The owner takes a sample of 64 bills. What is the probability the mean of his sample will be between $70.00 and $80.00?

Question

amistre64 · Answer

how many standard deviations fit between the mean and a defined endpoint?

amistre64 · Answer

hmm, standard errors is more likely what we want,  since we are given a sample size.

multiply the results by the sqrt of the sample size

anonymous · Answer

that's all the info they gave me .

amistre64 · Answer

thats all the info you need, and a table or stats calculator