In a random sample of six cell phones, the mean full retail price was $515.00 and the standard deviation was $212.00. Assume the population is normally distributed and use the t-distribution to find the margin of error and construct a 95% confidence interval for the population mean mu. Interpret the results. Question content area bottom Part 1 Identify the margin of error. 222.5 dollars (Round to one decimal place as needed.) Part 2 Construct a 95% confidence interval for the population mean. left parenthesis nothing comma nothing right parenthesis (Round to one decimal place as needed.)