Statistics

1. Please respond to question's on page 4 in the instructor's notes. Discuss your thoughts on whether the true mean lifetime is 41,000 miles. There are no right or wrong answers here - so please have an honest and open discussion with each other. Feel free to debate the responses with each other.

2.  Construct a 99% confidence interval for the mean lifetime of the tires - show the work

3. Look at the three intervals on the mean lifetime of the tires (90%,  95% and 99%) and comment on what is happening to the width of the intervals as the confidence level increases and why it is happening.