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

What weight would give a newborn a z-score of −0.75? [___] grams

Revolt · Accepted Answer

2925

Question 4

4000 g4500 g5000 g5500 g6000 g

Revolt · Accepted Answer

4500 g

Question 5

1000 g1500 g2000 g2500 g3000 g

Revolt · Accepted Answer

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

Question 6

4000 g4500 g5000 g5500 g6000 g

Revolt · Accepted Answer

5000 g

Question 7

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 8

1000 g1500 g2000 g2500 g3000 g

Revolt · Accepted Answer

2000 g; Selection 1: 3000 g; Selection 2: 4000 g

Question 9

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

Revolt · Accepted Answer

"47"; 51; 47

Question 10

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

45; 53

Introduction to Normal Distributions Answers

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