Question

The following data shows the number of student suspensions from a random sample of 40 local school districts in southwestern Pennsylvania.
37 63 29 500 106 5 47 117 51 13 46 8 65 71 223 57 10 16 60 60 15 51 198 48 56 20 72 80 110 43 6 15 37 187 26 182 140 76 39 37

a) Find the sample mean, the median and the sample standard deviation of this sample.
Sample mean = _________ Median = __________   Sample standard deviation = __________
b) What is the best point estimate for the population mean, µ, of the number of suspensions in southwestern Pennsylvania school districts?

Point estimate for µ = __________________
c) Compute a 95% confidence interval for the population mean, µ, of the number of suspensions in southwestern Pennsylvania school districts. (Show your work and indicate which calculator functions you used.)
Should you use a t-distribution or a z-normal distribution? ___________________
Why?      _______________________________________


Compute the 95% confidence interval _____________ <   µsuspensions   <   _____________

Answer 1