11. Given the sample data below, calculate the range, variance, and standard deviation:

17, 13, 38, 30, 13, 20, 5, 44, 24

range =

variance =

standard deviation = .

12. Here is a list of 27 scores on a Statistics midterm exam:

20, 30, 31, 32, 46, 48, 49, 52, 54, 59, 61, 69, 71, 73, 74, 79, 81, 81, 81, 85, 86, 87, 88, 91, 94, 96, 97

Find Q2: __________

13. IQ scores have a mean of 100 and a standard deviation of 15. Joe has an IQ of 130.

What is the difference between Joe's IQ and the mean? _________

Convert Joe's IQ score to a z score: _________