Selling prices of a PDA (personal digital assistant) in eighteen randomly chosen stores are shown below. 254 247 259 206 210 240 226 259 231 247 218 178 254 240 237 226 247 226 0 These data have x = 233.61, s =21.13, Q1 =226, Median = 238.5, Q3 =247. Use StatCrunch to find the requested summary statistics and confidence intervals. b. Determine the 95% confidence interval for the population mean u. The lower limit is The upper limit is (Round to two decimal places as needed.) Interpret this confidence interval. O A. We can be 95% confident that the mean population price is between $223.1 and $244.12. O B. Ninety-five percent of prices fall between $223.1 and $244. 12. O C. We can be 95% confident that all selling prices are between $223.1 and $244. 12. O D. We can be 95% confident that a given selling price will be between $223.1 and $244. 12. c. Are any of the observations more than 1.5 . IQR below Q1 or above Q3? O A. Yes, because there is at least one observation above (Q3 + 1.5 . IQR). O B. No, because all observations lie between (Q1 - 1.5 . IQR) and (Q3 + 1.5 . IQR). O C. Yes, because there are observations below (Q1 - 1.5 . IQR) and above (Q3 + 1.5 . IQR). O D. Yes, because there is at least one observation below (Q1 - 1.5 . IQR).d. The dotplot shows that the $178 observation is quite a bit lower than the others. Deleting this observation, find the mean and standard deviation, and construct the 95% confidence interval for p. x=(Round to two decimal places as needed.) s=(Round to two decimal places as needed.) Construct the 95% confidence interval for p. The lower limit is The upper limit is (Round to two decimal places as needed.)