15, 16 Suppose 60% of all people prefer Coke to Pepsi. We select 18 people for further study. How many would you expect to prefer Coke? a. 10.8 b. 60 c. 30 d. 1.8 e. 12 A XA processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the weight of the boxes, a few were checked. The mean weight was 20.4 pounds, the standard deviation 0.5 pounds. How many boxes must the processor sample to be 95% confident that the sample mean does not differ from the population mean by more than 0.2 pounds? 4.24 e. 40.9 6,24.01 d. 24.4 16:2.20. Which one of the following is a characteristic of the binomial probability distribution? a. The probability of success changes from trial to trial. b. There are only two possible outoomes to each trial of an experiment. e. The outcome of each trial depends on the previous trial. d. All of the above. e. None of the above. 17. Xe. if you guess on every question on this test, how many would you expect to get correct? a. 15 b. 10 e. 6 d. 3 e. 1 18. Sixty perecent of the customers of a fast food chain order the Whopper, french fries and a drink. Ifa random sample of 10 cash register receipts is selected, what is the probability that 5 or more will show that the above three food items were ordered? a 1.000 d. 0.000 b. 0.201 e. 0.166 e. 0.834 14.X . If you guess on every question on this test, what is the probability that you would pass (a passing grade is at least 14 correct)? e. 0 e. 01 a 20 b. 50 d..10 20. A manufacturer of window frames knows from long experience that 5% of the production will have some type of minor defect that will require an adjustment. What is the probability that in a sample of15 window frames at least one will need adjustment? a.463 d. I e. .05 b. 366 C. 537 * 2h In a binomial situation n-4 and a.25. What is the probability that x- 2? a 2109 c. 2500 d. 2491 e. .2901 b. 2592 XAn experiment involves selecting a random sample of 256 middle managers at random for study. One item of interest is their mean annual income. The sample mean is computed to be S35,420 and the sample standard deviation is $2050. What is the point. estimate? a. $138.36 c. $32,520 b. $2050. d. 256 e. $35,420