Question

Consider the following stem-and-leaf display for grades of 36 students in a statistics class:: 5 | 8 6| 0 2 6 8 7 | 2 2 2 4 5 5 8 9 9 8 | 1 1 2 5 5 6 6 6 8 9 9 | 1 2 3 4 5 5 6 8 8 9 9 9 In a pie chart, how many degrees are in the pie slice for the class "91-100"

Answer 1

the stem-and-leaf display for grades of 36 students in a statistics class:

5 | 8

6| 0 2 6 8

7 | 2 2 2 4 5 5 8 9 9

8 | 1 1 2 5 5 6 6 6 8 9

9 | 1 2 3 4 5 5 6 8 8 9 9 9

The frequency distribution table with computions required for pie chart is , then ,given by :-

Class	Frequency	Relative frequency (frequency/total)	Angle to be used (degrees) (Relative frequency)*360
51-60	2	0.056	20.16
61-70	3	0.083	29.88
71-80	9	0.250	90.00
81-90	10	0.278	100.08
91-100	12	0.333	119.88

Total

36

1.000

360.00

So the answer is :- 119.88 degrees are in the pie slice for class 91-100 .

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