A group of high school students was asked how many hours per week they thought would be reasonable for teachers to expect them to spend on homework and assignments. The responses are recorded in the table below.                      Hours   Number of Students       0-4 5       5-9 8       10-14 21       15-19 17       20-24 3       25-29 2         a. Calculate the mean number of hours that students thought was reasonable for teachers to expect them to spend on homework and assignments.    b. Calculate the standard deviation for the number of hours that students thought was reasonable for teachers to expect them to spend on homework and assignments.

A First Course in Probability (10th Edition)
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A group of high school students was asked how many hours per week they thought would be reasonable for teachers to expect them to spend on homework and assignments. The responses are recorded in the table below. 

                   

Hours   Number of Students      
0-4 5      
5-9 8      
10-14 21      
15-19 17      
20-24 3      
25-29 2      

 

a. Calculate the mean number of hours that students thought was reasonable for teachers to expect them to spend on homework and assignments. 

 

b. Calculate the standard deviation for the number of hours that students thought was reasonable for teachers to expect them to spend on homework and assignments.

 

 

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