2. A sample of 40 employees from a large company is selected. The employees' ages are summarized in the following frequency table:
Frequency
Employee Age
25-29
30-34
35-39
40-44
45-49
50-54
55-59
60-64
5
5
11
7
6
2
1
a) Use this table to estimate the mean age for this sample.
b) Use this table to estimate the standard deviation for the ages.