A software developer wants to know how many new computer games people buy each year. A sample of 219 people was taken to study their purchasing habits. Construct the 80% confidence interval for the mean number of computer games purchased each year if the sample mean was found to be 6.1. Assume that the population standard deviation is 1.5. Round your answers to one decimal place. Answer How to enter your answer (opens in new window) Lower endpoint: Upper endpoint: Tables Keypad Keyboard Shortc