Question

The Thompson Tire Company did research in Alabama regarding the miles their commercial truck tires would travel before they no longer met the Federal Highway Department tread depth requirements. The results of their study are in the file “Thompson Data Spring 2019” and show the mileage in 1,000 miles.

1. Calculate the mean, median and mode of the data.
2. Develop a box plot. Are there any outliers? Do the amounts follow a symmetric distribution or are they skewed? Justify your answer.
3. Construct a frequency distribution and a histogram from the data.
4. Thompson Tire Company claims the tires will last an average of 80,000 miles. Conduct a six-step hypothesis test to try to prove with 95% confidence that the tires will last over 80,000 miles.

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Answer 1

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