Texas Instruments TI-83 Plus Manual page 26

Exercises
1. Find the mean and sample standard deviation for the following data:
2. Find the median and interquartile range for the following grouped data:
3. What is the percentile rank of 82 in the following data?
4. Create a box-and-whisker plot for the following data:
71 23
Solutions
1. The sample mean Ë = 42.7. The sample standard deviation sx = 29.58.
2. The median is 59. The interquartile range is 45.
3. The number 82 is the 70
4.
34 23 55 91 23 34 12 34 98 23
Score
34
27
84
72
86
59
22
68 89 77 71
19 34 42 21
th
percentile.
Frequency
9
11
4
14
8
12
9
57 90 97 82
5 11 32 89
26
58 69
38 39 25 24