Question 3: Is there evidence that the population mean ODOMETER READING of 4-cylinder cars is greater than that of 6-cylinder cars? Use a 9% level of significance. Case Processing Summary Cases Case Processing Summary Valid Missing Total Cases N Percent N Percent N Percent Valid Missing Total Cy16 121 20.2% 479 79.8% 600 100.0% N Percent N Percent N Percent Cyl4 479 79.8% 121 20.2% 600 100.0% Descriptives Descriptives Statistic Std. Error Statistic Std. Error Cy16 Mean 43312.0000 2332.48702 Mean 91% Confidence Interval Lower Bound 39325.3278 Cyl4 48152.6994 1505.92929 for Mear 91% Confidence Interval Lower Bound 45594.3662 Upper Bound 47298.6722 for Mean Upper Bound 50711.0325 5% Trimmed Mean 40878.3150 5% Trimmed Mean 45744.6569 Median 35437.0000 Median 40040.0000 Variance 658299980.5 Variance 1086287230 Std. Deviation 25657.35724 Std. Deviation 32958.87180 Minimum 8199.00 Minimum 9.00 Maximum 143907.00 Maximum 205460.00 Range 135708.00 Range 205451.00 Interquartile Range 22968.50 Interquartile Range 37520.00 Skewness 1.634 220 Skewness 1.256 112 Kurtosis 1.861 223 Kurtosis 2.895 437 There is evidence that the population mean of the odometer reading of the 4 cylinder is greater a) Assume that variances are equal. b) Assume that variances are not equal