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Completing Table for Aptitude

Answer each of the following questions. Show all work.

1.                   Complete column 3 of the following table, which shows the amount of time job applicants took to complete an aptitude test..

The column 3 solution is:
Homework Time Number of Students Relative Frequency
(minutes) (f) (f/n)
0 to 5 0
6 to10 3
11 to 15 24
16 to 20 32
21 to 25 18
26 to 30 3

2.                   Construct an ordered stem-and-leaf diagram for the following data:

11 31 34 32
20 22 44 38
30 14 48 32
41 12 37 33
43 20 23 47

3.                   Given the following sample data, find the mean and the standard deviation.

15 7 28
42 12 9
53 14 47

4.                   Find the five-number summary for the following data that represent the weekly salaries for a sample of government employees.

39.1 30.3 18.5 33.9 27.1 27.8 8.6
23.9 42.6 32.7 20.1 12 5.1 13.8
22.2 10.9 16.3 25.4 17.2 15.3 51.7

5.                   The following data are for a population. Find the mean and the standard deviation.

867 666 748 740
475 468 636

Solution Preview

Please find the solutions attached herewith.

Answer each of the following questions. Show all work.

1.                   Complete column 3 of the following table, which shows the amount of time job applicants took to complete an aptitude test..

The column 3 solution is:
Homework Time Number of Students Relative Frequency To find the relative frequencies, divide each frequency by the total number
(minutes) (f) (f/n)
0 to 5 0 0/80=0
6 to10 3 3/80=0.0375
11 to 15 24 24/80=3/10=0.3
16 to 20 32 32/80=4/10=0.4
21 to ...

Solution Summary

The solution creates a stem-and-leaf diagram and standard deviation for statistics.

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