Introduction to Normal Distributions Answers

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4000 g4500 g5000 g5500 g6000 g

1000 g1500 g2000 g2500 g3000 g

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

Cynthia’s z-score is .

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.

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

grams

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

4000 g✔ 4500 g5000 g5500 g6000 g

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

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

4000 g4500 g✔ 5000 g5500 g6000 g

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.

99.7% of 7-year-old children are between inches and inches tall.