Name: _________________________________________________Period: ________
Introductory Statistics – Homework 2.1 B
Find the Midpoints, Relative Frequency and Cumulative Frequency for each.
1.
Class
Frequency
15 – 18
5
19 – 22
3
23 – 26
10
27 – 30
6
31 – 34
1
Midpoints
Relative
Frequency
Cumulative
Frequency
Midpoints
Relative
Frequency
Cumulative
Frequency
Σf=
2.
Class
Frequency
1 – 10
1
11 – 20
6
21 – 30
5
31 – 40
2
41 – 50
8
51 – 60
8
Σf=
3.
Create an Expanded Frequency Distribution for the following data.
Exam Scores for all students in a statistics class. Number of classes is 5.
83, 92, 94, 82, 73, 98, 78, 85, 72, 90
89, 92, 96, 89, 75, 85, 63, 47, 75, 82
Class
Tally
Frequency
Σf=
Midpoints
Relative
Frequency
Cumulative
Frequency