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G8 Statistics Practice

Total questions: 25

Worksheet time: 2hrs 3mins

Name
Class
Date
1.
The histogram displays the heights of several students at a school.  Based on the graph, how many students are 65 inches or shorter? 
a)
11
b)
16
c)
18
d)
21
2.
The box-and-whisker plot below shows the number of points each member of the middle school basketball team made during the game on Saturday.  What was the greatest number of points scored by a basketball player during the game on Saturday? 
a)
4
b)
6
c)
7
d)
8
3.
Jamie has math test scores of 65, 90, 75, and 93. Aaron has math test scores of 98, 88, 82, and 93. How do the mean and median of Jamie’s and Aaron’s test scores compare? 
a)
Aaron has a higher mean, but lower median test score than Jamie. 
b)
Jamie has a higher mean, but lower median test score than Aaron. 
c)
Jamie has a higher mean and median test score than Aaron.
d)
Aaron has a higher mean and median test score than Jamie. 
4.
Mr. Cook gave a history quiz last week. The scores from his class are shown below.  78, 82, 91, 75, 76, 86, 90, 88, 70, 72.  A student was absent on the day of the quiz and scored a 50 on the make-up quiz. What is the approximate difference in the class’ mean score before and after the make-up quiz? 
a)
3 points 
b)
4 points 
c)
5 points 
d)
6 points 
5.
Judy recorded the low temperatures at Clear Lake for ten days in May. She made the box-and- whisker plot to display her data.  Which value defines the upper quartile of the temperatures? 
a)
49
b)
50
c)
51
d)
52
6.

What is the outlier of this data set?

a)

13

b)

0

c)

11

d)

9

e)

There is no outlier

7.

The histogram shows the number of classes missed by students in a class during the school year. How many students are in the class?

a)

9

b)

11

c)

25

d)

3

8.

Choose the correct 5 number summary for the data

a)

28, 15, 42, 29.6, 39

b)

36, 41, 41, 55.5, 64

c)

49, 48.5, 51.5, 42, 39

d)

36, 39, 42, 55, 64

9.

What was the median high temperature in Middletown during the 7-day period shown in the table below?

a)

69

b)

70

c)

73

d)

75

10.

The heights, in inches, of 10 high school varsity basketball players are 78, 79, 79, 72, 75, 71, 74, 74, 83, and 71. Find the interquartile range of this data set.

(a)  

11.

Ms. Mosher recorded the math test scores of six students in the table above. Determine the mean of the student scores, to the nearest tenth.

(a)  

12.
Which interval has the highest frequency?
a)
9 - 10 books
b)
7-8 Books
c)
5-6 Books
d)
3-4 Books
13.
To find the ______ you put all numbers in order from least to greatest and then take the largest number minus the smallest number.
a)
Mean
b)
Median
c)
Mode
d)
Range
14.
To find the _________ you add up all the numbers and then divide by how many numbers you have.
a)
Mean
b)
Median
c)
Mode
d)
Range
15.

The mode is the number ________________________.

a)

you see most

b)

you see least

c)

you don't see

d)

you see first

16.

The median is the __________________ number (after you put them in order).

a)

first

b)

middle

c)

last

d)

one you see most

17.
What do you do if there are two numbers in "the middle" when you are finding the median?
a)
Pick your favorite number
b)
Add the two numbers in the middle & then divide by two.
c)
They are both the median
d)
None of the above
18.
How many cities have temperatures between 70 degrees and 99 degrees?
a)
44
b)
34
c)
26
d)
62
19.
What is the interquartile range (IQR)?
a)
4
b)
64
c)
60
d)
8
20.

Jada asked some students at her school how many hours they spent watching television last week, to the nearest hour. Here is a histogram for the data she collected. About how many students did Jada ask?

a)

30

b)

40

c)

100

d)

15

21.
a)
A
b)
B
c)
C
d)
D
22.
Jerry recorded the outdoor temperature at noon on the first day of each month for one year. He made the box-and-whisker plot below to display his data.  What is the range of temperatures? 
a)
40
b)
55
c)
70
d)
95
23.
Your test scores are 87, 86, 89, and 88.  You have one more test in the marking period. •You want your average to be a 90.  What is the lowest score you must get on your last test?
a)
96
b)
90
c)
94
d)
100
24.
The data below represents the numbers of books that twelve students read.
2, 4, 7, 8, 9, 12, 14, 18, 19, 21, 30, 32
Which box plot correctly summarizes the data? 
a)
A
b)
B
c)
C
d)
D
25.
Say 'TRUE' or 'FALSE'
Mean, Median, Mode of a grouped data are always equal 
a)
TRUE
b)
FALSE

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