Compute 95 con- fidence interval for difference between two

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Two car models are tested for a difference in average gas mileage. Ten cars of Model A averaged 32.1 miles per gallon with a standard deviation of 5.2 mpg. Twelve cars of Model B averaged 35.5 mpg with a standard deviation of 4.4 mpg. Calculate a 95% con- fidence interval for the difference between the two cars' mileage. There is no evidence to suggest the variances of the populations are equal. Explain your findings.

Reference no: EM13471131

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