The Human Relations Department of Electronics Incorporated would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses? A sample of 45 employees reveals the mean amount spent last year was $1,820, with a standard deviation of $660.


a. Compute a 95% confidence interval to estimate the population mean dental expense. (Round your answers to the nearest whole dollar amount.)