NAME _____________________________________________ DATE __________________ PERIOD _________
Lesson 1 Reteach
Mean
The mean of a data set is the sum of the data divided by the number of pieces of data.
Example
The pictograph shows the number
of members on four different
swim teams. Find the mean number
of members for the four different
swim teams.
Swim Team Members
Amberly
Carlton
9 + 11 + 6 + 10
4
36
= −− or 9
4
Hamilton
mean = −−−−−−−−−−
West High
Key:
= 1 swimmer
Exercises
Find the mean for each set of data.
Nov.
20
Dec.
19
Jan.
20
Feb.
17
Mar.
4
2.
Jacket Prices
Price ($)
Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use.
1. Month Snowfall (in.)
30
25
20
15
10
5
0
22
25
28
21
9
A
B
C
D
E
Jacket
3.
Number of Bicycles
4.
Checker Pieces
Smiths
A
Castros
B
C
Lius
D
Key:
= 1 bicycle
Course 1 • Chapter 11 Statistical Measures
Key:
= 1 checker piece
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