Question

The volume of stock is the number of shares traded on a given day. The following data, in millions represent the volume of Altria Group stock traded for a random sample of 35 trading days in a given year.

6.42 23.59 18.91 7.85 7.76 8.51 9.05 14.83 14.43 8.55

6.37 10.30 10.16 10.90 11.20 13.57 9.13 7.83 15.32 14.05

7.84 7.88 17.10 16.58 7.68 7.69 10.22 10.49 8.41 7.85

10.94 20.15 8.97 5.39 8.32

Construct a frequency distribution, histogram and frequency polygon using 6 classes.

(Show all your calculations for class width)

Answer 1

Maximum = 23.59

Minimum = 5.39

Range = Maximum - Minimum

         = 23.59 - 5.39 = 18.2

Class width = Range / # of classes = 18.2 / 6 = 3.03 next integer = 4

So, Class width = 4

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Class Interval	Frequency
5-9	16
9-13	9
13-17	6
17-21	3
21-25	1