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In: Statistics and Probability

4.   Sampling and Sampling Distributions In the most recent hearing on Highway safety at the New York...

4.   Sampling and Sampling Distributions

In the most recent hearing on Highway safety at the New York City Council hearings, it was determined that the average travels 1,123 miles per month.  Assume the population standard deviation is 341 miles per month. Determine the interval that will contain 95% of the sample means for the sample size of

a. 30 drivers

b. 45 drivers

c. Explain the difference in these probabilities

Solutions

Expert Solution

a)

The interval is (1000.9747, 1245.0253)

b)

The interval is (1017.323, 1228.677)

c) We can conclude that, as the sample size increases, the width of the interval decreases.

orchestra answered 1 year ago
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