An analyst has obtained the following data on monthly outofp

An analyst has obtained the following data on monthly out-of-pocket expenditures ($) for prescription drugs for a sample of senior citizens.

Monthly expenditures

Frequency

1 – 25

240

26 - 50

165

51 - 75

80

76 - 100

15

101 - 125

5

Compute the class midpoint for the second class.

13

35

38

50.5

Solution

The second class is - 26-50.

So, the lower limit is = 26,

and the upper limit is = 50.

The class midpoint is the average value of the lower limit and the upper limit.

So, the midpoint of second class = (26+50)/2 = (76)/2 = 38

Hence, class midpoint of second class = 38.

So, option (c) is correct.