The number of random samples is 75 Ty. The proportion of success is q equals 15/75 which equals .20. The confidence levels are 90%, 95%, and 99%. Table A2 for the z values are 1.645, 1.96 and 2.575.
Calculating p + Z and p – Z utilizing the confidence intervals the following ranges are listed below.
Using the confidence interval at 90% 1.645, 0.124, .0276; 95% 1.96, 0.109, 0.291; and 99% 2.575, 0.081, 0.319. With a 90% confidence interval on a quantity of dishes being service within 1 minute from the cook to the customer’s table is 12.4% to 27.6%. With a 95% confidence interval on a quantity of dishes being service within 1 minute from the cook to the customer’s table is 10.9% to 29.1%. With a 99% confidence interval on a quantity of