Expected Value

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

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 4

What is the z-score of a newborn who weighs 4,000 g? ⇒ 1

Revolt · Accepted Answer

1.4

Question 5

grams

Revolt · Accepted Answer

2925

Question 6

✔ 4000 g4500 g5000 g5500 g6000 g

Revolt · Accepted Answer

4000 g

Question 7

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

Revolt · Accepted Answer

2500 g; 95% of all newborn babies in the United States weigh between and .: 2500 g; 95% of all newborn babies in the United States weigh between and .: 4500 g

Question 8

4000 g✔ 4500 g5000 g5500 g6000 g

Revolt · Accepted Answer

4500 g

Question 9

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

Revolt · Accepted Answer

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

Question 10

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

Revolt · Accepted Answer

2000 g; 99.7% of all newborn babies in the United States weigh between and .: 2000 g; 99.7% of all newborn babies in the United States weigh between and .: 5000 g

Expected Value Answers

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