Aims Grade 8 Mathematics Sample Test And Think-Throughs With Answers Page 6
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36December 2009
Emily, Zeke, Harry, and Brook each conducted surveys on the number of books people have
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in their homes. Then they each answered the question below.
“Must all measures of central tendency appear
as a number in the set of data collected?”
Which student’s statement is true?
Emily says this is always true because all the measures of central tendency also have to
A
be numbers in the set of data.
Zeke says this is never true because all the measures of central tendency are never
B
numbers in the set of data.
Harry says this is sometimes true because the mean and median may or may not be in
C
the set of data, but the mode is always in the set of data.
Brook says this is sometime true because the mean and mode may or may not be in the
D
set of data, but the median is always in the set of data.
The stem-and-leaf plot represents test scores from two science classes.
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Mr. Vega
Ms. Watson
10 0
4, 3, 1
9 1, 4
8, 5, 4
8 2, 4, 5, 6, 7
Key
8, 7, 6, 0
7 0, 0, 2, 9
9, 6, 6
6 3, 6, 8
10 0 means 100
4, 2
5
Which statement about the data is true?
The median of Ms. Watson’s scores is less than the median of Mr. Vega’s scores.
A
The mode of Ms. Watson’s scores is less than the mode of Mr. Vega’s scores.
B
The mean of Mr. Vega’s scores is greater than the mean of Ms. Watson’s scores.
C
The range of Mr. Vega’s scores is greater than the range of Ms. Watson’s scores.
D
Students submitted pictures for the school yearbook. Only of the submitted pictures fit in the
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yearbook. There were 105 pictures that did not fit. Approximately how many total pictures were
submitted for the yearbook?
105
A
210
B
420
C
Go On►
500
D
Arizona Department of Education
6
Grade 8
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