# Statistics Worksheet

Statistics440.605.80

Litwok

Spring 2023

ASSIGNMENT #1

This assignment consists of 20 questions and corresponds to the Chapters 1 and 2 material. Each

question is worth 5 points. DO NOT USE SPECIFIC EXCEL FUNCTIONS TO

GENERATE YOUR ANSWERS, UNLESS SPECIFICALLY REQUESTED TO DO SO.

YOU MAY, HOWEVER, ALWAYS USE EXCEL TO PERFORM CALCULATIONS.

INPUT YOUR ANSWERS TO THIS ASSIGNMENT IN CANVAS. To do so, go to the

Assignments area and click on the Assignment #1 Answer Input link. You are able to input

your answers in bits and pieces. DO NOT HIT THE “SUBMIT” BUTTON UNTIL YOU

ARE COMFORTABLE WITH ALL OF YOUR ANSWERS. ONCE YOU HIT THE

“SUBMIT” BUTTON, YOUR ANSWERS ARE SUBMITTED AND CANNOT BE

CHANGED.

1. Consider the following distribution of data:

Temperature

70 – under 80

80 – under 90

90 – under 100

100 – under 110

110 – under 119

# Days

4

6

11

7

2

What percentage of days saw temperatures under 110 degrees?

a. 93.3%

b. 7%

c. 23.3%

d. 28%

2. A statewide survey was conducted to investigate the relationship between viewers’

preferences for ABC, CBS, NBC, or PBS for news information and their political party

affiliation. The results are as follows:

Democrat

Republican

Other

How many viewers were surveyed?

a. 12

b. 3,000

c. 50

d. 2,950

ABC

200

450

150

CBS

200

350

400

NBC

250

500

100

PBS

150

200

50

Statistics

440.605.80

Litwok

Spring 2023

3. Refer to the table in question 2. What percentage of viewers prefers to watch CBS?

a. 6.7%

b. 36.5%

c. 31.7%

d. 13.3%

4. Refer to the table in question 2. What percentage of Democrats prefers ABC?

a. 21.4%

b. 6.7%

c. 30%

d. 25%

5. The number of hours worked (per week) by 400 statistics students is shown below.

Number of hours

0- 9

10 – 19

20 – 29

30 – 39

Frequency

20

80

200

100

The class width for this distribution

a. is 9

b. is 10

c. is 39

d. varies from class to class

6. Refer to the table in question 5. The cumulative frequency for the class of 20 – 29

a. is 200

b. is 300

c. is 0.75

d. is 0.5

7. Refer to the table in question 5. The cumulative relative frequency for the class of 30 – 39 is

a. 100%

b. 75%

c. 50%

d. 25%

8. Refer to the table in question 5. If a cumulative frequency distribution is developed for the

data, the last class will have a cumulative frequency of

a. 100

b. 1

c. 30 – 39

d. 400

Statistics

440.605.80

Litwok

Spring 2023

9. A researcher is gathering data from four geographical areas designated: South = 1; North = 2;

East = 3; West = 4. The designated geographical regions represent

a. quantitative data

b. categorical data

c. qualitative data

10. For the following observations, plot a scatter plot and indicate what kind of relationship

exists between x and y.

x

8

5

3

2

1

y

4

5

9

12

14

a. positive

b. negative

c. no relationship

11. A sample of 15 children shows their favorite restaurants:

McDonalds

Friday’s

Pizza Hut

Mellow Mushroom

McDonalds

Luppi’s

McDonalds

Taco Bell

Luppi’s

Friday’s

Mellow Mushroom

McDonalds

McDonalds

Pizza Hut

McDonalds

Which of the following is the correct frequency distribution?

a. McDonald’s 4, Friday’s 3, Pizza Hut 1, Mellow Mushroom 4, Luppi’s 3, Taco Bell 1

b. McDonald’s 6, Friday’s 2, Pizza Hut 2, Mellow Mushroom 2, Luppi’s 2, Taco Bell 1

c. McDonald’s 6, Friday’s 1, Pizza Hut 3, Mellow Mushroom 1, Luppi’s 2, Taco Bell 2

d. none of the above

12. Refer to question 11. Which of the following is the correct relative frequency for

McDonald’s?

a. 0.27

b. 0.5

c. 0.4

d. 0.6

13. Refer to question 11. How large would the wedge of a pie chart be for Taco Bell?

a. 1%

b. 25%

Statistics

440.605.80

Litwok

Spring 2023

c. 16.7%

d. 6.7%

14. Twenty employees of the Ahmadi Corporation were asked if they liked or disliked the new

district manager. Below you are given their responses. Let L represent liked and D represent

disliked.

L

D

D

D

L

D

L

D

D

L

D

L

L

L

D

D

D

D

L

L

Construct a frequency and relative frequency distribution of these data. What is the frequency

associated with those who like the new district manager?

a. 9

b. 11

c. 20

d. 0.45

e. none of the above

15. Below you are given the examination scores of 20 students.

52

63

92

90

99

72

58

75

92

76

65

74

86

95

79

56

84

88

80

99

Construct a frequency, cumulative frequency, relative frequency, and cumulative relative

frequency distribution of these data. Let class width be 10 for all classes and let the first

class be 50 – 59. How many total classes comprise each distribution?

a. 3

b. 4

c. 5

d. 6

e. none of the above

16. Refer to question 15. What is the frequency associated with the 80 – 89 class?

a. 2

b. 3

c. 4

d. 5

e. none of the above

17. Refer to question 15. What is the cumulative frequency associated with the 70 – 79 class?

Statistics

440.605.80

Litwok

Spring 2023

a.

b.

c.

d.

e.

3

5

10

14

none of the above

18. Refer to question 15. What is the relative frequency associated with the 90 – 99 class?

a. 0.10

b. 0.15

c. 0.20

d. 0.25

e. none of the above

19. Refer to question 15. What is the cumulative relative frequency associated with the 80 – 89

class?

a. 0.10

b. 0.15

c. 0.20

d. 0.25

e. none of the above

20. Refer to question 15. The best way to graphically represent these data is by using a _____.

a. pie chart

b. scatter plot

c. histogram

d. bar chart

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