PayPal is interested in estimating the average number of transactions per year for their active account users.

The number of transactions per year is normally distributed. A random sample of size 25 is obtained from this population.The mean and standard deviation of the number of transactions for this sample are 73 and 8, respectively.

Calculate a 95% confidence interval for the population mean number of transactions. Give the upper limit (the right hand side of the interval) in the space provided.(2dp)