Per gallon gasoline prices charged by two rental companies are given tn the table Location Rental company A Rental company B Airport 1 4.33 4.25 Airport 2 4.72 4.93 Airport 3 4.11 4.07 Airport 4 4.65 4.58 Airport 5 4.23 4.08 Airport 6 4.21 4.11 Airport 7 4.49 4.81   Estimate the confidence interval for prices of gasoline for each rental company with 95 percent confidence level. Are the gasoline prices of the companies significantly different with significance level of 0.05? Estimate the confidence level of the variance in the process for each company with a 95 percent confidence. Are the variance of the gasoline prices of the two rental comopanies significantly different?

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