AutoSave OFF Excel Skills Demonstration Home Insert Draw Page Layout Formulas Data Cut Calibri (Body) 11 A A Copy Paste B I U Format Review View Tell me Wrap Text v General Norma Merge & Center $ %9 0 .00 0 Conditional Formatting as Table Format Good AVERAGE A 1 fx =Confidence! B E F G H J K M N P Q R S T The daily sales of Burger Baby restaurants follow the normal distribution with a standard deviation of $4000. 1 2 3 4 a. A sample is taken of 50 restaurants and the average sales were $40,000/day. What is the 99% confidence interval for the average restaurant sales? Answer 5 6 7 8 9 10 11 b 12 What is the probability that the average sales are really $36,000 or less per day? Assume the actual population average is $40,000 per day Answer 13 14 15 16 17 18 19 20 21 22 23 2 24 25 26 a A sample of the sales at 50 Haute Dog restaurants is taken and the sample mean is $30,000 per day with a sample standard deviation of $2000. The population standard deviation is not known. What is the 90% confidence interval for the daily sales at all restaurants. Answer 27 28 29 30 31 32 b 33 What is the probability that the average sales are really $32,000 or more per day? Assume that the population average is $30,000 per day and the std. Deviation is $2k. Answer 34 35 36 37 38 39 40 41 42 43 J42 44 45 46 47 48 49