Complete the following:
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