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Use the confidence interval to find the margin of error and the sample mean. Question list K (0.386,0.510) Question 4 . . . The margin of error is Question 5 The sample mean is Question 6 Question 7 Question 8 O Question 9Question list K In a random sample of 6 cell phones, the mean full retail price was $539.70 and the standard deviation was $195.00. Further research suggests that the population mean is $431.08. Does the t-value for the original sample fall between - to.95 and to.95 ? Assume that the population of full retail prices for cell phones is normally distributed. O Question 5 . . . The t-value of t = O Question 6 fall between - to.95 and to.95 because to.95 = (Round to two decima Question 7 does not does O Question 8 O Question 9 Question 10 Question 11 X Vi Vi (1,!) More