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Confidence interval : Multiple choice questions

1. 1,600 of 2,000 voters say they plan to vote Republican. Use 0.95 degree of confidence to find the popltn proportion interval.

A. 69.2 to 86.4%
B. 76.5 to 83.5%
C. 77.7 to 82.3%
D. 78.2 to 81.8%
E. none of the above

2. The mean weight of trucks traveling on the the highway is unknown. A state highway inspector needs an estimated mean. He selects 49 trucks passing the weighing station and gets a mean of 15.8 tons, w/ standard deviation of the sample of 3.8 tons. Using the 0.95 degree of confidence, what is the confidence interval w/in which the population mean lies?

A. 14.7 and 16.9
B. 13.2 and 17.6
C. 10.3 and 20.4
D. 16.1 and 18.1
E. none of the above

Solution Summary

Answers to multiple choice questions related to regression are given