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Mathematics, 27.07.2020 01:01 lekylawhite16
A1A Tires claims that its tires last longer than tires manufactured by its main competitor, YYZ Tires. A consumer group studied the lifespans of tires manufactured by each manufacturer. The accompanying table gives the lifespans of a random sample of 30 tires from each manufacturer, in thousands of miles. Assume that the population variances of the lifespan for tires manufactured by A1A Tires and by YYZ Tires are not equal, and assume that the lifespans of both companies' tires are normally distributed. Let A1A Tires be the first sample, and let YYZ Tires be the second sample. At the 0.05 level of significance, is there evidence that A1A Tires' claim is true? Perform the test using Excel. Find the test statistic, rounded to two decimal places, and the p-value, rounded to three decimal places.
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A1A Tires claims that its tires last longer than tires manufactured by its main competitor, YYZ Tire...
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