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# Hypothesis testing of tires and fuel economy

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A taxi company manager is trying to decide if the use of radial tires instead of regular belted tires improves fuel economy. As a test, twelve cars are equipped with belted tires and the cars are driven over a prescribed test course. Without changing drivers the same cars were then equipped with the radial tires and driven once again over the test course. The gasoline consumption in kilometers/liter is recorded in the attachment.

Can we conclude that the radial tires improve fuel economy (i.e. higher kilometers/liter)? Assume the fuel data is from normally distributed populations. State your hypotheses and use the P-value in your conclusion.

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This solution is provided in 268 words and is included in a .doc and .xls file. It goes through multiple stages through hypothesis testing, calculating t-value, estimated standard error, and mean square error.

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Problem 6

A taxi company manager is trying to decide if the use of radial tires instead of regular belted tires improves fuel economy. As a test twelve cars are equipped with belted tires and the cars are driven over a prescribed test course. Without changing drivers the same cars were then equipped with the radial tires and driven once again over the test course. The gasoline consumption in kilometers/liter is recorded as ...

##### Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.