Name _______________________________
Measures of Center and Spread Practice
Use the data given to find each of the measures indicated below.
1.
3, 8, 2, 0, 4, 4, 5
Median = _______
2.
Range = __________
Interquartile Range = ___________
3.
5, 6, 1, 2, 2, 8
Median = ________
Range = _________
Interquartile Range = __________
A set of data is given below.
9, 3, 0, 1, 2, 9, 1, 2, 4, 10
Which statement about the data is not true?
4.
A.
The interquartile range is greater than the median.
B.
The range is less than the median.
C.
The range is greater than the interquartile range.
D.
The median is 2.5.
A dot plot is shown below.
Find the median, range, and IQR for the values displayed in the dot plot.
Median = __________
5.
Range = __________
IQR = __________
The data sets show the ages of the players on two professional baseball teams.
Team A
Team B
27, 23, 21, 30, 31, 23, 22, 38,
28, 21, 25, 30, 28
24, 29, 31, 32, 27, 24, 20,
21, 31, 25, 29, 30
Which team has the largest range? What is that range?
Property of Cy-Fair ISD Middle School Math Dept. (6th grade) 2016-2017
Name _______________________________
6.
Jonathan counted the number of minutes he ran in one week. The data is shown on the stem-andleaf plot below.
Stem
Leaf
1
2
3
8
0
4
9
8
9
9
Key:
2 0 means 20
Which statement about the data is true?
7.
A.
The median is 20, and the interquartile range is 10
B.
The median is 19, and the interquartile range is 10
C.
The median is 20, and the interquartile range is 29
D.
The median is 19.5, and the interquartile range is 16
Melissa kept a record of the number of spikes she had during her last eight volleyball games. The
data is shown in the dot plot below.
Melissa’s Spikes Each Game
0
1
2
3
4
6
5
Number of Spikes
a.
Find the mean and median number of spikes per game.
Mean _______
b.
Determine the values below using the data given in the dot plot:
Median ________
Range _________
Lower quartile _________
Upper quartile _________
Property of Cy-Fair ISD Middle School Math Dept. (6th grade) 2016-2017
Interquartile Range ________