Introduction to Normal Distributions

Question 1

Use the information on the right to determine which students will have positive z-scores.

Revolt · Accepted Answer

B: Benjamin, who completed the exam in 86 minutes; C: Cynthia, who completed the exam in 72 minutes

Question 2

According to the empirical rule, 68% of all newborn babies in the United States weigh between and .

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E: 3000 g

Question 3

According to the empirical rule, 68% of 7-year-old children are between inches and inches tall.

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Part 1: 47; Part 2: 51

Question 4

Cynthia’s z-score is .

Revolt · Accepted Answer

0.2

Question 5

Question 5

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A: 4000 g

Question 6

Question 6

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51

Question 7

95% of all newborn babies in the United States weigh between and .

Revolt · Accepted Answer

D: 2500 g

Question 8

95% of 7-year-old children are between inches and inches tall.

Revolt · Accepted Answer

Part 2: 53

Question 9

Question 9

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B: 4500 g

Question 10

Question 10

Revolt · Accepted Answer

53

Introduction to Normal Distributions Answers