Assignment 1 Chapter 1 3 f2020 PDF

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Assignment 1 Fall 2017 MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.

The mean of the data pictured in the histogram is:

Frequency

1.

1._____

3 2 1 0

2

4

6

8

X 2

B)

4

C)

5

D)

6

2._____

The ogive (cumulative frequency distribution) corresponding to the accompanying histogram is:

b) Frequency

a)

30

100%

20 50%

10 0

2

4

6

8

X d) 30

100%

20 50%

10 0

2

4

6 X

8

Frequency

c)

Frequency

2.

A)

30

100%

20 50%

10 0

2

4

6 X

8

3.

The incomes of a group of 50 loan applicants are obtained. Which level of measurement is income? [2 marks] 3. A) Nominal B) Ordinal C) Interval D) Ratio E) None of the above

4.

___ is to a sample as ___ is to a population. [2 marks] 4. A) parameter – statistic B) statistic – parameter C) variable – constant D) parameter – variable

5.

6.

7

The main purpose of descriptive statistics is to: A)

Summarize data in a useful and informative manner.

B)

Make inferences about a population.

C)

Determine if the data adequately represents the population.

D)

Gather or collect data.

A bank asks customers to evaluate the drive-thru service as to good, average, or poor. Which level of measurement is this classification? A)

Nominal

B)

Ordinal

C)

Interval

D)

Ratio

E)

None of the above

5.

6.

Which one of the following is referred to as the population mean? [2 marks] 7 A) Statistic B)



C) Sample D) None of the above

8 The sample _____ is the sum of the data values divided by the number of data values. A. median B. midrange C. mean D. variance E. standard deviation

9 ____

9. The median of the following data set is

10____ .

30, 23, I5 12, 34, 17, 30, 19, 21, 32, 10, 30 A. 19 B. 30 C. 22 D. 20 E. 22.75 10. The mean of the following data set is

11____.

30, 23, 15, 12, 34, 17, 30, 19, 21, 32, 10, 30 A. 19 B. 30 C. 22 D. 20 E. 22.75 11. The mode of the following data set is . 30, 23, 15, 12, 34, 17, 30, 19, 21, 32, 10, 30 A. 19 B. 30 C. 22 D. 20 E. 22.75

12 A sample of the hourly wages of a number of employees at Coleman's Supermarkets is shown in the histogram below. The number of employees surveyed is: A.

75

B.

60

C.

47

D.

10

E.

4

12_____

13

The frequency polygon corresponding to the accompanying histogram is:

2._____

b) Frequency

a)

30

100%

20 50%

10 0

2

4

6

8

X

30

100%

20 50%

10 0

2

4

6

Frequency

d)

Frequency

c)

30

100%

20 50%

10 0

8

2

4

6

8

X

X

14. The Professor gives his class a quiz. The results are organized into the histogram shown. The midpoint of the class with the highest frequency is: A. 6.5 B 82.5 C. 75 D. 80 E 85

15. The Professor gives his class a quiz. The results are organized into the histogram shown. The number of students earning at least 75% is: A. 26 B 10 C. 20 D. 80 E 255

16 A study is done to examine the amount of active ingredient in a certain pill The results are organized into the histogram shown below. What is the Class Interval? A.

6

B.

0.01

C.

4

D. 0.002

17 A study is done to examine the amount of active ingredient in a certain pill The results are organized into the histogram shown below. The range of the data can be? A.

6

B.

0.01

C.

4

D. 0.002

Long answer: 1. Consider the following set of data: 1004

1005

1003

1004

1001

1004

1006

a. Use the 2k to suggest an appropriate number of classes to use. (2 pt.)

b. Find an appropriate class interval. (2 pt.)

c. Construct a frequency distribution. (Class and Frequency)

d. Construct a histogram. Use graph paper. (3 pts.)

(3 pts.)

2. Consider the following set of data:

4.7 5.2 3.4 0.6 2.7

4.9 9.2 5.4 5.0 4.5

9.7 3.1 8.3 6.2 3.5

1.0 3.4 3.7 3.0 0.3

1.3 6.3 4.9 5.6 1.0

a. Use the 2k to suggest an appropriate number of classes to use. (2 pt.)

b. Find an appropriate class interval. (2 pt.)

c. Construct a frequency distribution. (Class and Frequency)

d. Construct a histogram. Use graph paper. (3 pts.)

(3 pts.)

3. For the following data:

yellow blue green blue green

blue blue blue yellow blue

red red blue blue blue

green green yellow blue blue

green blue red red blue

a) Construct a frequency distribution. (5 marks)

b) Construct a bar chart (5 marks)...