3.40 A sample consisting of 100 employees has been given a manual-dexterity test. Given the accompanying frequency distribution, determine the approximate mean and standard deviation for these data. Data for Exercise 3.40 Score Number of Persons 5–under 15 7 15–under 25 9 25–under 35 12 35–under 45 14 45–under 55 13 55–under 65 9 65–under 75 8 75–under 85 11 85–under 95 10 95–under 105
3.40 A sample consisting of 100 employees has been given a manual-dexterity test. Given the accompanying frequency distribution, determine the approximate mean and standard deviation for these data.
Data for Exercise 3.40
Score Number of Persons
5–under 15 7
15–under 25 9
25–under 35 12
35–under 45 14
45–under 55 13
55–under 65 9
65–under 75 8
75–under 85 11
85–under 95 10
95–under 105
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