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The distribution of sample means for scores on a test for samples of size 100 is normal with a mean ...

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The distribution of sample means for scores on a test for samples of size 100 is normal with a mean ...

Question 1.

The distribution of sample means for scores on a test for samples of size 100 is normal with a mean of 61.7 and a standard deviation of 1.5. If a sample of 100 test scores is selected at random, what is the probability that the sample mean will be greater than 63.8?

▸ 0.0808

▸ 1.4

▸ 0.9192

▸ 0.0668

Question 2.

The distribution of sample means for scores on a test for samples of size 100 is normal with a mean of 63.3 and a standard deviation of 1.5. If a sample of 100 test scores is selected at random, what is the probability that the sample mean will be less than 60.6?

▸ 1.8

▸ 0.9641

▸ 0.0668

▸ 0.0359

Textbook

Statistical Reasoning for Everyday Life

Edition: 5^th

Authors: Bennett, Briggs, Triola

Read 48 times

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