Show all of your work. Write the answer in the space provided. 76 74 71 78 80 67 80 82 67 88 72 78 85 76 84 82 83 80 72 82 77 79 86 89 69 70 82 86 78 77 1. The ages of a sample of 30 people living in assisted living facilities in Columbia, South Carolina are shown in the table. Construct a dot plot for the data.
Show all of your work. Write the answer in the space provided.
76
74
71
78
80
67
80
82
67
88
72
78
85
76
84
82
83
80
72
82
77
79
86
89
69
70
82
86
78
77
1. The ages of a sample of 30 people living in assisted living facilities in Columbia, South Carolina are shown in the table.
Construct a dot plot for the data.
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (
STEM
LEAF
5
6 8
6
1 2 2 4 8
7
0 4 6 6
8
0 4 4 6 6 6 6 6
9
0 2 6
10
0
2. The following stem and leaf plot shows the scores on a recent test of Pre-Calculus students.
a. How many students took the test?
b. What were the highest and lowest scores?
c. How many students scored 70 or higher?
d. What percent of the students scored lower than 70?
15
17
23
26
27
35
72
88
91
98
102
3. The revenues of the top eleven personal computer manufacturers are given (in hundred millions).
a. Compute the first
a. Q1
b. Q3
c. M
b. The third quartile.
c. Determine the median.
d. Draw a box plot for the data.
( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( ( (
e. Calculate Pearson’s coefficient of skewness.
4. Listed to the right are the selling prices (in thousands of dollars) for a sample of 19 lakeside lots in Pinnacle Peak, a vacation home community in the Blue Ridge mountains.
86
61
148
81
39
142
140
65
28
85
90
92
25
50
85
85
82
120
137
Determine the following:
a. the first quartile
b. the third quartile
c. the median
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