3. A survey of the amount of time in minutes playing video games of the 120 students are collected and given in the table below: No. of Minutes 10 - 19 3 20 29 30-39 8. 40 -49 6. 50-59 10 60 - 69 12 70 - 79 13 80-89 18 14 100 - 109 11 110 119 8. 120 - 129 4. 130 - 139 3. 140 - 149 a. Compute the variance and standard deviation (use formula for population). b. Compute the mean deviation. 21

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S. A survey of the amount of time in minutes playing video games of the
120 students are collected and given in the table below:
No. of Minutes
10 -19
20 - 29
30 - 39
40 -49
6.
50 - 59
10
60 - 69
12
70-79
13
80 - 89
18
14
100 - 109
11
110 - 119
8.
120 - 129
130 - 139
140 149
a. Compute the variance and standard deviation (use formula for
population).
b. Compute the mean deviation.
4. Dr. Smith, a researcher of a certain university, has collected
information on millionaires, including their ages. Suppose the mean
age of 42 millionaires is 54.5 years, with a standard deviation of 12.3
years.
a. Apply Chebychev's theorem with k = 2 to make some
observations about the ages of the 42 millionaires.
b. Repeat part (a) with k = 3.
3.
41
3.
2.
Transcribed Image Text:S. A survey of the amount of time in minutes playing video games of the 120 students are collected and given in the table below: No. of Minutes 10 -19 20 - 29 30 - 39 40 -49 6. 50 - 59 10 60 - 69 12 70-79 13 80 - 89 18 14 100 - 109 11 110 - 119 8. 120 - 129 130 - 139 140 149 a. Compute the variance and standard deviation (use formula for population). b. Compute the mean deviation. 4. Dr. Smith, a researcher of a certain university, has collected information on millionaires, including their ages. Suppose the mean age of 42 millionaires is 54.5 years, with a standard deviation of 12.3 years. a. Apply Chebychev's theorem with k = 2 to make some observations about the ages of the 42 millionaires. b. Repeat part (a) with k = 3. 3. 41 3. 2.
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