A random sample of 10 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. Assume the population standard...

A random sample of 10 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. Assume the population standard deviation is 85. If appropriate, construct a 99.5% confidence interval for the mean price for all phones of this type being sold on the internet in 2013. Round your answer to one decimal place.