A random sample of 250 retail sales firm is taken and owners are asked to identify the number of workers currently employed. The following frequency distribution is reported with "** "representing a missing value:

Number of Employees Frequency

1-25 16

26-50 47

51-75 78

76-100 63

101-125 38

126-150 ** (?)

1. What is the missing value (**)?

2 What is the relative frequency in the 101-125 class?

3 What is the cumulative frequency of the 126-150?

4 What is the cumulative relative frequency of the 51-75 class?