Business statistic

Question 1

l%20

What is the arithmatic mean of the following set of numbers? 90, 91, 77, 110, 94, 92, 89, 100, 119, 113,

112, 83.

a. 64

b. 1170

c. 100.6

d. 97.5

8 points

Question 2

l%20

Below is a frequency table of board lengths. What lenght of boards has the lowest frequency?

Length (inches) Number of Items

10 up to 20 3

20 up to 30 4

30 up to 40 8

40 up to 50 9

a. 30 up to 40

b. 10 up to 20

c. 20 up to 30

d. 40 up to 50

9 points

Question 3

l%20

The departments in a large corporation are listed such as finance, marketing, and warehouse supervision . Which level of measurement are these departments?

a. Interval

b. Nominal

c. Ratio

d. Ordinal

8 points

Question 4

l%20

The numbers of traditional print newspapers sold were examined. Which level of measurement is the number of newspapers sold?

a. Ordinal

b. Ratio

c. Interval

d. Nominal

8 points

Question 5

l%20

What is the class interval for the table of factory wages below?

Hourly Wages Number of Wage Earners

$10 – up to $13 22

$13 – up to $16 28

$16 – up to $19 10

$19 – up to $22 8

a. $2.50

b. $8

c. $3

d. $2

8 points

Question 6

l%20

The mean life of a light bulb is 1000 hours and the standard deviation is 100 hours. The life of the part is normally distributed allowing the use of the Empirical Rule. Applying the Empirical Rule, it can be concluded that 99.7% of the bulbs will last between:

a. 800 and 1200 hours

b. 950 – 1150 hours

c. 700 and 1300 hours

d. 900 and 1100 hours

8 points

Question 7

l%20

What is the best choice of graph/chart to display the follow data as given?

Weight Cumulative Number

10-15 pounds 3

20-25 pounds 9

30-35 pounds 12

40-45 pounds 17

a. Cumulative frequency graph

b. Bar chart

c. Histogram

d. Pie chart

8 points

Question 8

l%20

What is the best choice of graph/chart to display the opinion survey data below?

Response Number of Responses

Not Satisfied 20

Satisfied 40

Very Satisfied 60

a. Bar chart

b. Cumulative frequency chart

c. Frequency Polygon

d. Histogram

9 points

Question 9

l%20

What is the relative frequency of those earning salaries between $30,000 and $40,000?

Annual Salaries Number

$30,000 – $40,000 5

$50,000 – $60,000 10

$80,000 – $90,000 3

$100,000 – $110,000 7

a. 0.12

b. 0.024

c. 0.4

d. 0.20

9 points

Question 10

l%20

Which of the following is an example of a discrete variable?

a. Number of hunters in the woods

b. Temperature of a heat treating process

c. Weight of ball bearings in machinery

d. Distance between Backus, MN and Conway, AR

8 points

Question 11

l%20

The data set below is a sample data set. Calculate the sample standard deviation.

10, 20, 30

a. 13

b. 66.7

c. 8.2

d. 10

9 points

Question 12

l%20

What is the interquartile range for the following set of data?

Minimum = 20

Q1 = 30

Median = 50

Q3 = 70

Maximum = 100

a. 30

b. 80

c. 40

d. 60

8 points

Question 13

l%20

Data Set A, Data Set B, and Data Set C, have the same population mean of 50. Data set A has a standard deviation of 13. Data Set B a standard deviation of 25. Data Set C a standard deviation of 14. Which data set distribution has the largest spread in the distribution?

a. Data Set B

b. Data Set C

c. Data Set A

d. None of the above

9 points

Question 14

l%20

Examine the dot plot in the middle of page 87 that is associated with question #48. What is the number of days that 90 Biggie Size soft drinks were sold?

a. 2 days

b. 8 days

c. 14 days

d. 12 days

8 points

Question 15

l%20

Please use Chart 2-7 on page 43 of your text book. Approximately 25% of vehicles sold for what what amount of profit?

a. $1800

b. $1425

c. $1600

d. $2300

8 points

Question 16

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Refer to the following wage breakdown. What is the class midpoint for the wage class with the highest frequency?

Wage ($) Frequency

5-7 14

9-11 15

13-15 28

17-19 22

a. $15

b. $19

c. $6

d. $14

8 points

Question 17

l%20

The median value in the following set of numbers is:

54, 76, 30, 18, 46, 82

a. 49

b. 50

c. 46

d. 49.8

9 points

Question 18

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The entire set of individuals or objects of interest is also called a ——————?

a. Tally

b. File

c. Population

d. Sample

8 points

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Take Test: Exam 1

Content

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l%20 Test Information

Instructions

Description This test covers Chapters 1, 2, 3, 4 of the text. There are 18 questions, all 8 or 9 points each for a total of 150 points. You are allotted two hours for the exam.

Instructions Click the most correct answer to each question and ensure you submit the exam. I will not be able to award credit if you do not submit the exam.

Timed Test This test has a time limit of 2 hours.This test will save and submit automatically when the time expires.

Warnings appear when half the time, 5 minutes, 1 minute, and 30 seconds remain.

Multiple Attempts Not allowed. This test can only be taken once.

Remaining Time:

1 hour, 32 minutes, 44 seconds.

Question Completion Status:

Question 1

l%20

What is the arithmatic mean of the following set of numbers? 90, 91, 77, 110, 94, 92, 89, 100, 119, 113,

112, 83.

a. 64

b. 1170

c. 100.6

d. 97.5

8 points

Question 2

l%20

Below is a frequency table of board lengths. What lenght of boards has the lowest frequency?

Length (inches) Number of Items

10 up to 20 3

20 up to 30 4

30 up to 40 8

40 up to 50 9

a. 30 up to 40

b. 10 up to 20

c. 20 up to 30

d. 40 up to 50

9 points

Question 3

l%20

The departments in a large corporation are listed such as finance, marketing, and warehouse supervision . Which level of measurement are these departments?

a. Interval

b. Nominal

c. Ratio

d. Ordinal

8 points

Question 4

l%20

The numbers of traditional print newspapers sold were examined. Which level of measurement is the number of newspapers sold?

a. Ordinal

b. Ratio

c. Interval

d. Nominal

8 points

Question 5

l%20

What is the class interval for the table of factory wages below?

Hourly Wages Number of Wage Earners

$10 – up to $13 22

$13 – up to $16 28

$16 – up to $19 10

$19 – up to $22 8

a. $2.50

b. $8

c. $3

d. $2

8 points

Question 6

l%20

The mean life of a light bulb is 1000 hours and the standard deviation is 100 hours. The life of the part is normally distributed allowing the use of the Empirical Rule. Applying the Empirical Rule, it can be concluded that 99.7% of the bulbs will last between:

a. 800 and 1200 hours

b. 950 – 1150 hours

c. 700 and 1300 hours

d. 900 and 1100 hours

8 points

Question 7

l%20

What is the best choice of graph/chart to display the follow data as given?

Weight Cumulative Number

10-15 pounds 3

20-25 pounds 9

30-35 pounds 12

40-45 pounds 17

a. Cumulative frequency graph

b. Bar chart

c. Histogram

d. Pie chart

8 points

Question 8

l%20

What is the best choice of graph/chart to display the opinion survey data below?

Response Number of Responses

Not Satisfied 20

Satisfied 40

Very Satisfied 60

a. Bar chart

b. Cumulative frequency chart

c. Frequency Polygon

d. Histogram

9 points

Question 9

l%20

What is the relative frequency of those earning salaries between $30,000 and $40,000?

Annual Salaries Number

$30,000 – $40,000 5

$50,000 – $60,000 10

$80,000 – $90,000 3

$100,000 – $110,000 7

a. 0.12

b. 0.024

c. 0.4

d. 0.20

9 points

Question 10

l%20

Which of the following is an example of a discrete variable?

a. Number of hunters in the woods

b. Temperature of a heat treating process

c. Weight of ball bearings in machinery

d. Distance between Backus, MN and Conway, AR

8 points

Question 11

l%20

The data set below is a sample data set. Calculate the sample standard deviation.

10, 20, 30

a. 13

b. 66.7

c. 8.2

d. 10

9 points

Question 12

l%20

What is the interquartile range for the following set of data?

Minimum = 20

Q1 = 30

Median = 50

Q3 = 70

Maximum = 100

a. 30

b. 80

c. 40

d. 60

8 points

Question 13

l%20

Data Set A, Data Set B, and Data Set C, have the same population mean of 50. Data set A has a standard deviation of 13. Data Set B a standard deviation of 25. Data Set C a standard deviation of 14. Which data set distribution has the largest spread in the distribution?

a. Data Set B

b. Data Set C

c. Data Set A

d. None of the above

9 points

Question 14

l%20

Examine the dot plot in the middle of page 87 that is associated with question #48. What is the number of days that 90 Biggie Size soft drinks were sold?

a. 2 days

b. 8 days

c. 14 days

d. 12 days

8 points

Question 15

l%20

Please use Chart 2-7 on page 43 of your text book. Approximately 25% of vehicles sold for what what amount of profit?

a. $1800

b. $1425

c. $1600

d. $2300

8 points

Question 16

l%20

Refer to the following wage breakdown. What is the class midpoint for the wage class with the highest frequency?

Wage ($) Frequency

5-7 14

9-11 15

13-15 28

17-19 22

a. $15

b. $19

c. $6

d. $14

8 points

Question 17

l%20

The median value in the following set of numbers is:

54, 76, 30, 18, 46, 82

a. 49

b. 50

c. 46

d. 49.8

9 points

Question 18

l%20

The entire set of individuals or objects of interest is also called a ——————?

a. Tally

b. File

c. Population

d. Sample

8 points