AnswersPre-Algebra - MA3119 B-CRSummarizing Data Sets with Statistics

Summarizing Data Sets with Statistics Answers

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1
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Which statements are true about statistics? Check all that apply.

A
They help describe sets of data.
B
They include the mean, median, range, and interquartile range.
C
They include only mean and median.
D
Measures of center and measures of spread are examples of statistics.
E
They can work only with one set of data.
3

Range = 134✔ 6

A
1
B
3
C
4
D
✔ 6
5

Which data set has two values for the mode?

A
2, 2, 2, 5, 6, 7, 9, 10
B
5, 6, 8,10, 11, 11, 15, 18
C
12, 12, 13, 13, 14, 14, 15, 15
D
21, 22, 22, 24, 25, 26, 28, 28
6

The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.

Answers:
Selection 1:Plot 1
Selection 2:Plot 1
Selection 3:Plot 2
Selection 4:Plot 2
7

Choose each correct measure.Mean = 22.5✔ 3.54

Answers:
Selection 1:3.5
Selection 2:3.5
Selection 3:6
Selection 4:1
8

Which measure of central tendency should the librarian use?

A
the mean
B
the median
C
either the mean or median since they are the same
D
neither the mean nor median because there is too much variability
9

What conclusions can be drawn from the data set? Check all that apply.

A
The measures of center are the same.
B
The interquartile range is 4.
C
There is little variability in the data.
D
The average temperature is 98.
E
The data is clustered around the mean.
11

The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.

Answers:
The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.:6
The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.:5
The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.:3.5
The bar graph shows the number of games a soccer team played each month. Use the data to find each measure.:The values are clustered around the median.
12

Which of these statements is true? Check all that apply.

A
CDs have a higher mean than digital.
B
The range of digital is 800.
C
The median of CDs is 400.
D
Both have the same interquartile range.
E
Both have the same median.
F
Digital’s mean is around 467.
13

Highest mean: ✔ Plot 1Plot 2Each has the same mean.

Answers:
Selection 1:Plot 1
Selection 2:Plot 1
Selection 3:Plot 2
Selection 4:Plot 2
14

Two sets of data have the same measures of central tendency. Are the data sets the same? Explain.

Answer:

/explanation: The data sets could be the same, but not necessarily. It is possible for data sets to differ in their spread but still have the same measures of center. The measures of spread could be different.

15

Range = 2✔ 579

A
2
B
✔ 5
C
7
D
9
16

Highest median: ✔ Plot 1Plot 2Each has the same median.

A
✔ Plot 1
B
Plot 2
C
Each has the same median.
18

Highest range: Plot 1✔ Plot 2Each has the same range.

A
Plot 1
B
✔ Plot 2
C
Each has the same range.
19

Which is true of this data? ✔ The values are clustered around the median.The values are spread out.The data shows a lot of variability.The data shows a large spread

A
✔ The values are clustered around the median.
B
The values are spread out.
C
The data shows a lot of variability.
D
The data shows a large spread

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