Stat 101 – Sheet 4
King Saud University
Almajmaa’h Engineering College
STAT 101
1430/2009
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Sheet (6)
1. Briefly explain what summary statistics are used to construct a box-andwhisker plot.
2. Prepare a box-and-whisker plot for the following data:
36 543 28 52 41 59 47 61
24 55 63 73 32 25 35 49
31 22 61 42 58 65 98 34
Does this data set contain any outliers?
3. Prepare a box-and-whisker plot for the following data:
11 8 26 31 62 19 7 3
14 75 33 30 42 15 18 23
29 13 16 6
Does this data set contain any outliers?
4. The following data give the weights (in pounds) lost by 15 members of a
health club at the end of two months after joining the club.
5 10 8 7 25 12 5 14
11 10 21 9 8 11 18
Construct a box-and-whisker plot. Are the data symmetric or skewed?
5. The following data give the numbers of computer keyboards assembled at
the Twentieth Century Electronics Company for a sample of 25 days.
45 52 48 41 56 46 44 42 48 53
51 53 51 48 46 43 52 50 54 47
44 47 50 49 52
Prepare a box-and-whisker plot. Comment on the skewness of these data.
Dr. SaMeH
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