Week 2: Quiz

Statistics Questions (Practice Set)

Question 1

A categorical variable has three categories with the following frequencies:

Which of the following represents the correct percentage values of each category and the correct conclusion?

• a.
  Category | Frequency | Percentage
  A | 13 | 36%
  B | 28 | 46%
  C | 9 | 18%
  Category “B” is the majority

• b.
  Category | Frequency | Percentage
  A | 13 | 56%
  B | 28 | 26%
  C | 9 | 18%
  Category “A” is the majority

• c.
  Category | Frequency | Percentage
  A | 13 | 26%
  B | 28 | 56%
  C | 9 | 18%
  Category “B” is the majority

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Question 2

Which of the following ordered arrays is correct for the data below?

68, 94, 63, 75, 71, 88, 64

• a. Ordered array: 94, 88, 75, 71, 68, 64, 63

• b. Ordered array: 63, 64, 68, 71, 75, 88, 94

• c. Ordered array: 63, 71, 64, 75, 68, 88, 94

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Question 3

The following frequency distribution shows the average time needed by businesses to resolve cyberattacks:

What percentage of businesses took between 1 and less than 14 days?

• a. 34.12%

• b. 86.94%

• c. 56.97%

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Question 4

Which of the following correctly represents the attributes of a Pareto Chart?

• a. Data is plotted as vertical bars in descending order

• b. Includes a cumulative percentage line

• c. All the above

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Question 5

In a Pareto Chart, what categories make up nearly 68% of all defects?

• a. Folded flaps and bent flaps

• b. Folded flaps, bent flaps, and carton won’t open

• c. Folded flaps, bent flaps, cartons won’t open, and poor ink adhesion

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Question 6

In a pie chart, what combined percentage represents dogs and cats in the U.S. (2011–2012)?

• a. Nearly 35.7%

• b. Nearly 43.6%

• c. Nearly 64.6%

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Question 7

Which of the following stem-and-leaf displays is correct for the data below?

54, 69, 98, 93, 53, 74

• a.
  5 | 3
  6 | 9
  7 | 4
  9 | 3

• b.
  5 | 34
  6 | 9
  7 | 4
  9 | 38

• c.
  5 | 3
  5 | 4
  6 | 9
  7 | 4
  9 | 3
  9 | 8

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Question 8

Which ordered array represents the following stem-and-leaf display?

• a.
  9.1, 9.4, 9.7, 10.0, 10.2, 10.2, 10.3, 10.8, 11.1, 11.2, 11.5, 11.5, 11.6, 11.6, 11.7,
  11.7, 11.7, 12.2, 12.2, 12.3, 12.4, 12.8, 12.9, 13.0, 13.2

• b.
  9.1, 9.4, 10.0, 10.2, 10.2, 10.3, 10.8, 11.1, 11.2, 11.5, 11.5, 11.6, 11.6, 11.7, 11.7,
  12.2, 12.3, 12.4, 12.8, 12.9, 13.2

• c.
  9.1, 9.4, 9.7, 10.0, 10.2, 10.3, 10.8, 11.1, 11.2, 11.5, 11.6, 11.7, 12.2, 12.3,
  12.4, 12.8, 12.9, 13.0, 13.2

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Question 9

What proportion of customers shopped at the store because of merchandise or convenience?

• a. 85%

• b. 65%

• c. 50%

• d. 35%

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Question 10

A study of 200 students examined study habits and performance:

Of those who went bar hopping, what percentage did well?

• a. 55

• b. 30

• c. 27.27

• d. 15

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Question 11

Of those who did well, what percentage went bar hopping?

• a. 27.27

• b. 15

• c. 50

• d. 30

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Question 12

What percentage of students went bar hopping and did well?

• a. 30

• b. 15

• c. 27.27

• d. 50

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Question 13

What percentage of students studied and did well?

• a. 50

• b. 72.72

• c. 80

• d. 40

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Question 14

Given the following data:

How many drivers are in the sample?

• a. 5

• b. 15

• c. 50

• d. 18

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Question 15

How many total claims are represented in the sample?

• a. 111

• b. 250

• c. 15

• d. 50

Tutorial for Quiz