Question

construct a frequency distribution for the data set. Use the following table headings: class,frequency,midpoint,relative frequency,cumulative frequency Number of classes:5 Data set: Exam scores for all students in statistics class 83,92,94,82,73,98,78,85,72,90,89,92,96,89,75,85,63,47,75,82

Answer 1

Given data 47, 63, 72, 73, 75, 75, 78, 82, 82, 83, 85, 85, 89, 89, 90, 92, 92, 94, 96, 98

Range = 98-47=51

Number of classes =5

width of class =

Class	Frequency	Midpoint	Relative frequency	Cumulative frequency
44-54	1	49	0.05 or 5%	1
55-65	1	60	0.05 or 5%	2
66-76	4	71	0.20 or 20%	6
77-87	6	82	0.30 or 30%	12
88-98	8	93	0.40 or 40%	20
Total	20	XX	1 or 100%	XX