In an effort to estimate the mean amount spent per customer for dinner at an Atlanta restaurant, data were collected for a sample of 49 customers with a sample mean of $24.80. Based upon past studies the population standard deviation is assumed known with ? = $5.
a. At 95% confidence, what is the margin of error?
b. Develop a 95% confidence interval estimate of the mean amount spent for dinner.
Enter your answer using parentheses and a comma, in the form (n1,n2). Do not use dollar sign or spaces or include a comma in a number. Example: (1234.56,34567.89)