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

A newborn who weighs 2,500 g or less has a low birth weight. Use the information on the right to find the z-score of a 2,500 g baby.

Revolt · Accepted Answer

-1.6

Question 3

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

Revolt · Accepted Answer

E: 3000 g

Question 4

According to the empirical rule, 68% of 7-year-old children are between inches and inches tall. 95% of 7-year-old children are between inches and inches tall.

Revolt · Accepted Answer

:  "47"; : 51

Question 5

Brenda is 50 inches tall. Her z-score is .

Revolt · Accepted Answer

1

Question 6

Cynthia’s z-score is .

Revolt · Accepted Answer

0.2

Question 7

What is the z-score of a newborn who weighs 4,000 g?

Revolt · Accepted Answer

1.4

Question 8

✔ 4000 g4500 g5000 g5500 g6000 g

Revolt · Accepted Answer

A: 4000 g

Question 9

Question 9

Revolt · Accepted Answer

51

Question 10

Zach has a z-score of –1.5. His height is inches.

Revolt · Accepted Answer

45

Introduction to Normal Distributions Answers

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