The Locust Tree Restaurant keeps records of reservations and no-shows. When 150 Saturday reservations are randomly selected,

Question:

The Locust Tree Restaurant keeps records of reservations and no-shows. When 150 Saturday reservations are randomly selected, it is found that 70 of them were no-shows (based on data from American Express). Using a 90% degree of confidence, find a confidence interval for the proportion of Saturday no-shows.