Computer lab fees. A college’s technology committee wants to perform a test to see if the mean amount of time students are spending in the computer lab has increased from 55 minutes. Here are the data from a random sample of 12 students.

Time 52 74 57 53 54 136 76 73 62 8 52 62

a) Plot the data. Are any of the observations outliers?
Explain.

b) What do you conclude about the claim? If there are outliers, perform the test with and without the outliers present.