4. 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 =

Find Q1 =

5. Calculate the 5 number summary and the interquartile range of the following data:

72, 40, 44, 33, 67, 50, 54, 41, 21, 16, 48, 59, 43, 27, 36

Q1 =

Q2 =

Q3 =

Min =

Max =

IQR =

There is a potential outlier in this data set

• A. False
• B. True

8. For each of the given sample data sets below, calculate the mean, variance, and standard deviation.

(a) 79, 52, 64, 99, 75, 48, 52, 24, 76

mean =

variance =

standard deviation =

(b) 60, 45, 60, 53, 44, 40

mean =

variance =

standard deviation =

(c) 3.8, 3.8, 2.4, 4.3, 4.4

mean =

variance =

standard deviation =

9. Find the second decile of the following data set.

24, 64, 25, 40, 45, 34, 14, 26, 28, 24, 58, 51

D2= _______

10. Here is a list of 25 scores on a Math midterm exam:

38.5, 41.5, 52, 52.5, 61, 63, 63.5, 68, 69, 69, 78.5, 79, 80, 83, 87, 88.5, 88.5, 91, 91.5, 92, 92.5, 94, 94, 97, 97

Find P36: _______