C) If appropriate, construct a 99.5% confidence interval for the mean price for all phones of this type being sold on Internet in 2013. Round your intermediate step to three decimal places. A 99.5% confidence interval for the mean price for all phones of this type being sold on the Internet in 2013 is between ____

Question 11 of 12 (1 point) Attempt 2 of Unlimited View question in a popup 7.1 Section E How smart is your phone? A random sample of 10 Samsung Galaxy smartphones being sold over the Internet in 2013 had the following prices, in dollars: 199 169 385 329 269 149 135 249 299 249 Send data to Excel Assume the population standard deviation is o = 85. Perform the following. Part 1 of 3