Use the data in Exercise 23 in Section 13.1 for the following.

a. Compute a point estimate for the mean noise level for streets with a mean speed of 35 kilometers per hour.

b. Construct a 99% confidence interval for the mean noise level for streets with a mean speed of 35 kilometers per hour.

c. Predict the noise level for a particular street with a mean speed of 35 kilometers per hour.

d. Construct a 99% prediction interval for the noise level of a particular street with a mean speed of 35 kilometers per hour.

Exercise 23

How much noisier are streets where cars travel faster? The following table presents noise levels in decibels and average speed in kilometers per hour for a sample of roads.

Transcribed Image Text:

Speed Noise 28.26 78.1 36.22 79.6 38.73 81.0 29.07 78.7 30.28 78.6 30.25 78.5 29.03 78.4 33.17 79.6