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A purchasing agent for a trucking company is shopping for replacement tires for their trucks from two suppliers. The suppliers' prices are the same. However, Supplier A's tires have an average life of 60,000 miles with a standard deviation of 10,000 miles. Supplier B's tires have an average life of 60,000 miles with a standard deviation of 2,000 miles. Which of the following statements is true?
A. The two distributions of tire life are the sameB. On average, Supplier A's tires have a longer life then Supplier B's tiresC. The life of Supplier B's tire is more predictable than the life of Supplier A's tiresD. The dispersion of Supplier A's tire life is less than the dispersion of Supplier B's tire life
The Absent Minded Professor study was a RCT, which had an objective to estimate the protective effect of drug "No-Reminder" compared to drug "Reminder" on risk of "Forgetful syndrome". The study found that the drug "No-Reminder" was protective.
let the number of trials be n = 3, and let the probability of success be p = 0.0228. Use a calculator to compare:
The dean of students believes that teh costs are greater this semester. What is the test value for this hypothesis?
Store used ANOVA to test if mean sales for each credit card were equal. What are the degrees of freedom for F statistic?
Public transportation and the automobile are 2 methods an employee can use to get to work each day. Samples of times recorded for each method are shown. Times are in minutes.
Calculate the control limits for a c chart when Ubar = 3.0%, n = 60, and you collect one sample per hour for 40 hours of production. (2 sets of control limits required, x bar and range)
Determine the probability of receiving at most three calls in a five-minute interval of time. Determine the probability of receiving exactly 10 calls in 15 minutes.
If one NBA player is selected at random, find the probability that this player is either 7 feet tall or weighs over 200 pounds.
Compute the following linear programming problem and describe the special case of a linear programming problem in which.
Recent medical research demonstrated there is a strong (r=.60) correlation between the excessive weight and incidences of breast cancer. How can we interpret this statement?
Estimate with 95% confidence the mean reduction in time it takes for someone who has taken the sleeping pill to fall asleep.
The Wilcoxon signed rank statistic, The mean for the Wilcoxon signed rank test and The P-value for the Wilcoxon signed rank test
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