1. The following data is the annual income (in $1,000s of U.S. dollars) taken from nine randomly chosen students in the Hopkins Internetbased MPH program:
3 37 102 34 12 111 56 72 17 33
a) Calculate the sample mean income
b) Calculate the sample median income
c) Calculate the sample standard deviation of these incomes
d) What population could this sample represent?
e) Which would change by a larger amount-the mean or median-if the 34 were replaced by 17, and the 12 replaced by a 31?