The ages of the signers of the Declaration of Independence a

The ages of the signers of the Declaration of Independence are shown here. (Age is approximate since only the birth year appeared in the source, and one has been omitted since his birth year is unknown.) Construct a frequency distribution for the data using seven classes.

41 54 47 40 39 35 50 37 49 42 70 32

44 52 39 50 40 30 34 69 39 45 33 52

44 62 60 27 42 34 50 42 52 38 36 45

35 43 48 46 31 27 55 63 46 33 60 62

35 46 45 34 53 50 50

To construct seven classes, the range for each class (or the class width) should be How many years?

Solution

To construct 7 classes, subtract the minimum value from the maximum.

70-27=43

Now divide it by 7 to get the range of each class: 43/7=6.1 or approximately 6.