A university system enrolling hundreds of thousands of students is considering a change in the way students pay for their education.Currently,the students pay $400 per credit hour.The university system administrators are contemplating charging each student a set fee of $7,000 per quarter,regardless of how many credit hours each takes.To see if this proposal would be economically feasible,the administrators would like to know how many credit hours,on the average,each student takes per quarter.A random sample of 250 students yields a mean of 14.1 credit hours per quarter and a standard deviation of 2.3 credit hours per quarter.Suppose the administration wanted to estimate the mean to within 0.1 hours at 95% reliability and assumed that the sample standard deviation provided a good estimate for the population standard deviation.How large a total sample would they need to take?
Correct Answer:
Verified
Q57: A prison official wants to estimate the
Q58: The t distribution allows the calculation of
Q59: The upper bound of a 90% confidence
Q60: The county clerk wants to estimate the
Q61: The standardized normal distribution is used to
Q63: A confidence interval was used to
Q64: The head librarian at the Library of
Q65: SCENARIO 8-1
The managers of a company are
Q66: The head librarian at the Library of
Q67: A confidence interval was used to estimate
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents