Introduction to Normal Distributions

Question 1

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

Revolt · Accepted Answer

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

Question 2

Cynthia’s z-score is .

Revolt · Accepted Answer

0.2

Question 3

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

Revolt · Accepted Answer

2500 g; Selection 1: 2500 g; Selection 2: 4500 g

Question 4

Question 4

Revolt · Accepted Answer

4500 g

Question 5

99.7% of all newborn babies in the United States weigh between and .

Revolt · Accepted Answer

2000 g; Selection 1: 2000 g; Selection 2: 5000 g

Question 6

Question 6

Revolt · Accepted Answer

5000 g

Question 7

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

Revolt · Accepted Answer

3000 g; Selection 1: 3000 g; Selection 2: 4000 g

Question 8

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

Revolt · Accepted Answer

Part 1: 47; Part 2: 51

Question 9

Question 9

Revolt · Accepted Answer

4000 g

Question 10

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

Revolt · Accepted Answer

Part 2: 53

Introduction to Normal Distributions Answers