Exercise 1 Page 735

We want to create a frequency table for the given data set. We will begin by identifying the minimum and maximum values of the data. Then we can define the intervals for each line of our table. 12, 9, 10, 14, 10, 11, 10, 18, 21, 10, 14, 22 The minimum value is 9 and the maximum is 22. In this case, intervals of 3 seem reasonable. Let's list the intervals in the first column of our frequency table.

Hours	Frequency
9 - 12
13 - 16
17 - 20
21 - 24

Now, let's count the number of values in each interval. 12, 9, 10, 14, 10, 11, 10, 18, 21, 10, 14, 22 Looking at the data, we can see that there are 7 values in the first interval, 2 values in the second interval, 1 value in the third interval, and 2 values in the fourth interval. Now we can complete the second column of our table.

Hours	Frequency
9 - 12	7
13 - 16	2
17 - 20	1
21 - 24	2