# Answers - Omni Middle School

```Rachel took 5 tests in her history class. Her test scores
are shown in the table below.
Rachel’s Test Scores
Chapter in
Test
History Book
Score
1
2
3
4
5
60
90
80
70
60
Rachel’s teacher calculated the mean, median, mode, and
range of Rachel’s set of test scores. Which of these
measures has the highest value?
mean 
60  90  80  70  60 360

 72
5
5
median  60 60 70 80 90
mode  60
range  90  60  30
Jacob scored an 88, 92, 74, and 80 on his first four math
tests. What score must he receive on his next math test
to finish the grading period with a mean of 82?
The mean would equal the
and divided by 5…
F. 66
G. 76
H. 82
I. 88
Multiply each
side of the
equation by 5…
88  92  74  80  x (5)
(5)82 
5
410  88  92  74  80  x
Combine Like
410  334  x
Terms…
 334  334
Subtract 334 from
76  x
each side of the
equation…
Emma bowled scores of 182, 164, 168, 164, 174, and 152 in
the district and regional bowling tournaments. Which of
the following scores would Emma need in her next game to
give her a median score of 168?
Write the scores in order
from smallest to largest
using the scores given and
find the median (middle)…
A. 30
A. 30, 152, 164, 164, 168, 174, 182
B. 150
B. 150, 152, 164, 164, 168, 174, 182
C. 164
C. 152, 164, 164, 164, 168, 174, 182
D. 188
D. 152, 164, 164, 168, 174, 182, 188
Bailey scored 21, 16, 12, and 14 points in his first four
basketball games. Which of the following scores would
Bailey need in his next game to have a mean score of 15?
The mean would equal the
and divided by 5…
F. 10
G. 12
H. 14
I. 15
Multiply each
side of the
equation by 5…
21  16  12  14  x (5)
(5)15 
5
75  21  16  12  14  x
Combine Like
75  63  x
Terms…
 63  63
12 x
Subtract 63 from
each side of the
equation…
Mr. Williams recorded his 1st period science test scores on
a stem-and-leaf plot as shown below.
6
7
8
9
5
3
0
1
9
8
2 8 8
5
Key
6|5 = 65
Abigail was absent and needed to take the test. Which
score must Abigail receive to have the mode of the test
scores be remain unchanged?
A. 65
B. 80
C. 88
D. 95
The mode is the number in the set
of data that occurs the most. In
this set of data, 88 is the mode.
To keep the mode at 88, she must
get an 88 on her test.
```