How many hours per week do you spend on e-mail? In 2010, the GSS included a question

Question:

How many hours per week do you spend on e-mail? In 2010, the GSS included a question on number of hours spent on e-mail. Data are presented here for a sample of 99 men and women.
E-mail hours per week Frequency
0 ..................................... 19
1 ..................................... 20
2 ..................................... 13
3 ..................................... 5
4 ..................................... 2
5 ..................................... 6
6 ..................................... 5
7 ..................................... 2
8 ..................................... 3
9 ..................................... 1
10 or more .......................... 23
a. Compute the cumulative frequency and cumulative percentage for the data.
b. What proportion of the sample spent 3 hours or less per week on e-mail?
c. What proportion of the sample spent 6 or more hours per week on e-mail?
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