Using the Central Limit Theorem

Question 1

What is the z-score for 19 hours? Round to 2 decimal places.

Revolt · Accepted Answer

1.13

Question 2

What is the area under the Normal curve to the left of 19 hours? Round to 4 decimal places.

Revolt · Accepted Answer

0.8708

Question 3

Standard deviation:

Revolt · Accepted Answer

0.174

Question 4

We wanted to know what the probability that the sample mean height of the professional basketball players is less than the sample mean height of the American men. We found that is approximately 0. What is the correct interpretation of this probability?

Revolt · Accepted Answer

It is nearly impossible to select a random sample of 25 professional basketball players and a random sample of 50 American men and find that the sample mean height of the American men is greater than the sample mean height of the professional basketball players.

Question 5

Shape:

Revolt · Accepted Answer

Approximately Normally distributed

Question 6

For which cases is it appropriate to calculate a probability about a difference in two sample means based upon an approximately Normal sampling distribution?

Revolt · Accepted Answer

A, C, D

Question 7

Mean:

Revolt · Accepted Answer

1.9

Using the Central Limit Theorem Answers

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