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Statistics Weekly

Total questions: 29

Worksheet time: 31mins

Name
Class
Date
1.
If you score 76, 85, 97, and 83 on your math tests, what would your median score be? 
a)
84
b)
90
c)
85
d)
88
2.
The salary of the employees in the office were $15,000; $18,000; $16,000; $14,000; $90,000; and $17,000.  What is the best measure of the central tendency of the salaries?
a)
Mean
b)
Median
c)
Mode
d)
Range
3.
The heights of the starting 5 players on a basketball team are 60 inches, 67 inches, 64 inches, and 65 inches.  If the mean or balance point of the players is 65, what is the height of the 5th player?
a)
70
b)
69
c)
61
d)
68
4.
a)
spread
b)
mean
c)
outlier
d)
median
5.
How many students scored more than 80%?
a)
10
b)
13
c)
7
d)
15
6.
What is the mode of the scores?
a)
24
b)
14
c)
34
d)
30
7.
How many students have more than 1,000 songs on their MP3 player?
a)
5
b)
16
c)
10
d)
4
8.
What measure of central tendency (mean, median or mode) would be best for the following set of data?
0, 89, 92, 97, 99, 100
a)
Mode, because it is the one that shows up the most.
b)
Median, because there is an outlier.  The outlier could be incorrect and would influence the mean too much.
c)
Mean, because there is not an outlier.  You should always use the mean.
d)
There is not a best measure of central tendency for this data.
9.

What is the Q1 of this data set?

6, 7, 2, 1, 5, 2, 1, 6

a)

1

b)

1.5

c)

2

d)

2.5

10.
Find the Lower Quartile of the following numbers:
84, 88, 72, 74, 98, 16, 94 
a)
72
b)
88
c)
94
d)
There is no Lower Quartile.
11.
Roger bowled 7 games last weekend. His scores are: 155, 165, 138, 172, 127, 193, 142. What is Roger's median score?
a)
127
b)
155
c)
156
d)
193
12.
Find the median, mode and range: 
3, 5, 7, 9, 11, 8, 3
a)
median:7  mode:3  range:10
b)
median:6  mode:3  range:7
c)
median:7  mode:3 range:8
13.
33, 25, 42, 25, 31, 37, 46, 29, 38
What is the interquartile range of the data?
a)
8
b)
9
c)
13
d)
21
14.
The number of cookies that were made at a bakery for each of seven days is shown:
108, 96, 96, 84, 108, 240, and 84
The best measure of center for this data set is the-
a)
median because 240 is much higher than the other numbers in the data set
b)
median because all of the values are close to one another in value 
c)
mean because 240 is much higher than the other numbers in the data set 
d)
mean because all of the values are close to one another in value
15.

Quartiles are all worth ______ percent.

a)

50%

b)

33%

c)

25%

d)

10%

16.
Which box and whisker plot shows more "spread out" data?
a)
Top plot
b)
Bottom plot
17.

Which city has a lower IQR?

a)

City A

b)

City B

18.

What is the mean absolute deviation of 13, 14, 17, 28, and 28?

a)

6.4

b)

8.6

c)

4.6

d)

6.3

19.

What is the median of the data shown?

a)

9

b)

9.5

c)

10

d)

There is no median

20.

What is the range of the data shown?

a)

82

b)

2

c)

3

d)

83

21.

Find the Mean Absolute Deviation:

58, 38, 54, 48, 20, 26, 36

a)

43.2

b)

20.91

c)

11.42

d)

9.34

e)

15.3

22.

Describe the distribution:

a)

Symmetric

b)

Skewed left

c)

Skewed right

23.

The mean of this distribution would be ______ the median.

a)

approximately equal to

b)

less than

c)

greater than

24.

What percent of values are below the mean of an approximately normal distribution?

a)

50%

b)

68%

c)

95%

d)

99.7%

25.

What is the mode of the following data set?
12, 15, 12, 18, 22, 15, 12

a)

22

b)

18

c)

15

d)

12

26.

Calculate the interquartile range (IQR) for the data set:

5, 7, 8, 12, 15, 18, 22, 24

a)

7

b)

15

c)

12

d)

10

27.

If the mean of a data set is 50 and the sum of all data points is 500, how many data points are in the set?

a)

5

b)

20

c)

10

d)

15

28.

Find the 5 summary statistics of 34, 45, 23, 56, 48, 57, 49, 29, 57, 47

a)

Min= 23, Max = 57, Q1= 43, Q3= 65, Med= 47

b)

Min= 23, Max = 57,

Q1= 34, Q3= 65,

Med= 45

c)

Min= 23, Max = 57,

Q1= 34, Q3= 56,

Med= 47.5

d)

Min= 23, Max = 57,

Q1= 36, Q3= 63,

Med= 45.7

29.

Find the range and Inter quartile Range of

45, 24 56, 78, 65, 39, 60, 75, 55, 38

a)

Range= 54

IQR= 26

b)

Range= 44

IQR= 28

c)

Range= 45

IQR= 26

d)

Range= 54

IQR= 43

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