Question 15 (7 points) Explain the difference between parts A and C. In both parts we are asked whether or not there is evidence that the population mean was over $300. In part A: x(bar) = $315.40; s = $43.2; Sample size = 25 In part C: x(bar) = $315.40; s = $75; Sample size = 25 The larger mean adds uncertainty in the sample. The sample may have had some outliers. The smaller mean adds uncertainty in the sample. The sample may have had some outliers. The larger standard deviation adds uncertainty in the sample. The sample may have had some outliers. The smaller standard deviation adds uncertainty in the sample. The sample may have had some outliers.