Question

One hundred students were asked to record the number of hours they spent doing homework for a week. The information is presented in the table.



Time Spent on Homework


Hours Number of
Students
0 10
1 18
2 25
3 32
4 15



What is the mean (average) amount of hours these students spent doing homework for the week?


3.00


2.24


2.00


1.21

Answer 1

Compute the weighted mean: (0·10 + 1·18 + 2·25 + 3·32 + 4·15) / 100 = (0 + 18 + 50 + 96 + 60) / 100 = 224/100 = 2.24.

Answer: 2.24