At the time she was hired as a server at the grumney family restaurant, beth brigden was told, "you can average $80 a day in tips." assume the population of daily tips is normally distributed with a standard deviation of $9.95. over the first 35 days she was employed at the restaurant, the mean daily amount of her tips was $84.85. at the 0.01 significance level, can ms. brigden conclude that her daily tips average more than $80?

Comprehensive illustrative problem: mira's store on february 1 20a4 mica delaman opened astore that sells school supplies her main customer are the students and teachers of happy students school that is situated in front of her store. mira wanted to know the financial position of mira's store. mira knew you were studying accounting. so she asked for . 1. to start her business mira's opened a checking account in the name of mira's store . the statement of account from the bank shows that the checking account has a balance of 31,535 of december 31,20a4

Ashop owner uses a reorder point approach to restocking a certain raw material. lead time is six days. usage of the material during lead time is normally distributed with a mean of 42 pounds and a standard deviation of four pounds. when should the raw material be reordered if the acceptable risk of a stockout is 3 percent?

Aproduction line has three machines a, b, and c, with reliabilities of .96, .86, and .85, respectively. the machines are arranged so that if one breaks down, the others must shut down. engineers are weighing two alternative designs for increasing the line’s reliability. plan 1 involves adding an identical backup line, and plan 2 involves providing a backup for each machine. in either case, three machines (a, b, and c) would be used with reliabilities equal to the original three. a. compute overall system reliability under plan 1. (round your intermediate calculations and final answer to 4 decimal places.) reliability b. compute overall system reliability under plan 2. (round your intermediate calculations and final answer to 4 decimal places.) reliability c. which plan will provide the higher reliability? plan2plan1