Which type of data (nominal, ordinal, interval, ratio)

| March 29, 2017

Question
Question 1 1 pts

Which type of data (nominal, ordinal, interval, ratio) is the following variable?

Number of employees in the Walmart store in Hutchinson, Kansas.

ordinal

nominal

interval

ratio

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Question 2

Which type of data (nominal, ordinal, interval, ratio) is the following variable?

Number of merchandise returns on a randomly chosen Monday at a Walmart store.

interval

ordinal

ratio

nominal

Question 3

Which type of data (nominal, ordinal, interval, ratio) is the following variable?

Name of the cashier at register 3 in a Walmart store.

ratio

ordinal

interval

nominal

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Question 4

Which type of data (cross-sectional or time series) is the following variable?

Value of Standard & Poor’s 500 stock price index at the close of each trading day last year.

cross-sectional

time series

Question 5

Which type of data (cross-sectional or time series) is the following variable?

Closing price of each of the 500 stocks in the S&P 500 index on the last trading day this week.

cross-sectional

time series

Question 6

Which type of data (cross-sectional or time series) is the following variable?

Dividends per share paid by General Motors common stock for the last 20 quarters.

time series

cross-sectional

Question 7

What type of data (discrete or continuous) is the following variable?

Length of a TV commercial.

continuous

discrete

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Question 8

What type of data (discrete or continuous) is the following variable?

Number of peanuts in a can of Planter’s Mixed Nuts.

discrete

continuous

Question 9

Identify the following as descriptive or inferential statistics.

Statistics on what percentage of North Carolinians favors legislation to ban smoking in public areas.

inferential

descriptive

Question 10

Identify the following as descriptive or inferential statistics.

The average starting wage of a random sample of 100 Economics majors.

descriptive

inferential

Question 11

Consider the following weights (in pounds) of 10 randomly selected men:

150, 145, 180, 200, 175, 190, 142, 175, 240, 150.

Calculate the mean weight.

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Question 12

Consider the following weights (in pounds) of 10 randomly selected men:

150, 145, 180, 200, 175, 190, 142, 175, 240, 150.

Calculate the median weight.

Question 13

The following is a list of starting salaries, in thousands of dollars, for 11 recent college graduates with Economics degrees:

46, 32, 40, 32, 50, 55, 46, 37, 32, 48, 60.

Calculate the mode.

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Question 14

Consider the following data values:

18, 12, 7, 10, 15, 12, 6, 12, 14.

Assuming these are a sample, calculate the sample variance.

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Question 15

Consider the following data values:

18, 12, 7, 10, 15, 12, 6, 12, 14.

Assuming these are a sample, calculate the sample standard deviation.

Question 16

Prof. Hardtack gave Friday quizzes last semester in his 10-student senior tax accounting class. Here are the grades for one quiz.

60, 60, 60, 60, 71, 73, 74, 75, 88, 99.

Calculate the coefficient of variation for the quiz, written as a percent (i.e., a number between 0 and 100).

Question 17

Assume the average age of a college student is 20.2 years old with a standard deviation of 2.1 years. Calculate the z-score for a student is who 27 years old.

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Question 18 1 pts

Consider the following dataset:

38, 55, 76, 20, 30, 66, 17, 54.

Determine the 20th percentile.

Question 19

Consider the following dataset:

38, 55, 76, 20, 30, 66, 17, 54.

Determine the third quartile (Q3).

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Question 20

Consider the following dataset:

38, 55, 76, 20, 30, 66, 17, 54.

Determine the IQR.

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Question 21

The Bay Street Inn is a 7-room bed-and-breakfast in Santa Theresa, CA. The probability or room rentals during February is:

x

P(x)

0

0.05

1

0.05

2

0.06

3

0.10

4

0.13

5

0.20

6

0.15

7

0.26

Total

1.00

What is the average number of room rentals?

Question 22

The Bay Street Inn is a 7-room bed-and-breakfast in Santa Theresa, CA. The probability or room rentals during February is:

x

P(x)

0

0.05

1

0.05

2

0.06

3

0.10

4

0.13

5

0.20

6

0.15

7

0.26

Total

1.00

What is the standard deviation of room rentals?

Question 23

J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.

Find the probability that in a sample of 8 car buyers, all 8 will use the Internet.

Question 24

J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.

Find the probability that in a sample of 8 car buyers, at least 5 will use the Internet.

Question 25

J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.

Find the probability that in a sample of 8 car buyers, less than 3 will use the Internet.

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Question 26

J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.

Find the mean of the probability distribution.

Question 27

J.D. Power and Associates says that 60 percent of car buyers now use the Internet for research and price comparisons.

Find the standard deviation of the probability distribution.

Question 28

The U.S. mint, which produces billions of coins annually, has a mean daily defect rate of 5.2 coins. Let X be the number of defective coins produced on a given day.

On a given day, what is the probability of exactly five defective coins?

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Question 29

The U.S. mint, which produces billions of coins annually, has a mean daily defect rate of 5.2 coins. Let X be the number of defective coins produced on a given day.

On a given day, what is the probability of more than 10 defective coins?

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Question 30 1 pts

The U.S. mint, which produces billions of coins annually, has a mean daily defect rate of 5.2 coins. Let X be the number of defective coins produced on a given day.

On a given day, what is the probability of fewer than 4 defective coins?

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