Four students are about the purchase concert tickets for $22.50 for each ticket. they discover that they may purchase a block of 5 tickets for $110.00. how much would each of the 4 save if they can get a fifth person to join them and the 5 people equally divide the price of the 5 ticket block

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.