It seems these days that students have to work more and more each week to be able to afford the costs of college. For a recent labor survey conducted by the
government, there were 78 respondents who were working while attending college. The frequency distribution below summarizes the number of hours worked
per week as reported by the respondents.
Number of hours
worked per week Frequency
(hours per week)
26 to 30
31 to 35
36 to 40
41 to 45
46 to 50
51 to 55
10
24
20
13
7
4
Based on the frequency distribution, using the midpoint of each data class, estimate the mean number of hours worked per week by the respondents. For your
intermediate computations, use four or more decimal places, and round your answer to one decimal place.


hours per week