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Central Tendency

3. Exercise 3 used ISSP date on the number of hours worked per week for a sample
of 75 Japanese adults

a. Calculate the mean for worked hours worked per week.

b.Compare the value of the mean with those you have already calculated for the
median. Without constructing a histogram, describe whether and how the
distribution of hours worked per week skewed.

The following data frequency distribution contains info on the # of hrs worked per week for a sample of 75 Japanese adults.

Hours worked per week Frequency Percent Cumulative Percent
7 1 1.3 1.3
12 1 1.3 2.6
15 2 2.7 5.3
20 3 4.0 9.3
24 1 1.3 10.6
30 7 9.3 19.9
32 1 1.3 21.2
35 2 2.7 23.9
36 2 2.7 26.6
38 2 2.7 29.3
40 13 17.3 46.6
41 1 1.3 47.9
42 2 2.7 50.6
43 1 1.3 51.9
45 7 9.3 61.2
48 2 2.7 63.9
50 14 18.7 82.6
54 2 2.7 85.3
55 1 1.3 86.6
60 6 8.0 94.6
65 1 1.3 95.9
66 1 1.3 97.2
68 1 1.3 98.5
72 1 1.5 100.00

total 75 100.

Solution Preview

3. Exercise 3 used ISSP date on the number of hours worked per week for a sample of 75 Japanese adults
a. Calculate the mean for worked hours worked per week.

To find the mean, ...

$2.19