The life of Supplier B's tire is more predictable than the life of Supplier A's tires. B. The dispersion of Supplier A's tire life is less than the dispersion of Supplier B's tire life. C. On average, Supplier A's tires have a longer life than Supplier B's tires.

For an Economics test the mean score is 100 and the standard deviation is 10, and for an Accounting test the mean score is 50 and the standard deviation is 4. You are given the test scores of a student who took both tests. Determine on which test the student had a better score. Enter E if the student did better on the Economics test Enter A if the student did better on the Accounting test Enter S if the student did relatively the same on both tests.   A student scores 125.6 on the Economics test and 60.2 on the Accounting test. The student did better/same on                test.

George has an average bowling score of 180 and bowls in a league where the average for all bowlers is 150 and the standard deviation is 20.  Bill has an average bowling score of 190 and bowls in a league where the average is 160 and the standard deviation is 15.  Who ranks higher in his own league, George or Bill? George because his standard score is higher than Bill's. Bill because his standard score is higher than George's. George because the standard deviation in his league is higher than the standard deviation in Bill's league. Bill because his 190 is higher than George's 180. Bill and George have the same rank in their leagues because both are 30 pins above the mean

C. Atlantic Video is planning to add the new Marvel movie to their collection, and they predict that this will double their demand (i.e. new arrival rate is 60 customers every hour) and halve the standard deviation of the inter-arrival times. However, they want to keep the average waiting time of customers in line the same as before. Assume that the coefficient of variation for the check-out times does not change. Please answer the following questions.     1) Does the employee need to work twice as fast? If not, calculate the new service rate. 2) What is the average number of customers in the store?