Prices of Toasters You took a random sample of 18 two-slice toasters and found the mean price was $65.49 and the standard deviation was $18.73. Assume the prices are normally distributed.
1. Which distribution, the t-distribution or the normal distribution, should be used for this problem?
State your reason why. If neither distribution can be used, explain why.
2. If you decided to use either the t-distribution or the normal distribution in question 13, construct a 90% confidence interval for the population mean. If you decided that neither distribution could be used, write "not applicable" for your answer.