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Ace used-car sales manager Jack has no idea whether the $100,000 he pays for training for his used car salespeople works. He asks Dave, the leading salesperson, and Dave says he thinks it works but can't really tell. So, Jack has hired your local helpful stats star and asked whether the training makes a difference. Here are the data-you tell Jack whether the training worked.
Tire will last 50000 miles before it comes bald or fails. adjustment is made on any tire that doesn't last 50000. purchase four tires. what is the probability all four tires will last at least 50000 miles.
Is there evidence of a difference in the mean query answer time between the two call centre teams? (Use a=0.05). Time to answer queries.
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
Joe is waiting in continuous time for a book called The Winds of Winter to be released. Suppose that the waiting time T until news of the book's release.
An engineering firm is considering the possibility of establishing a branch office in Toronto and one in Mexico City.
a survey has revealed that 75 of all college students study. it is also known that 85 of all students who study will
The data taken for this study came from a survey of two insurance carriers. The first carrier (C1) was compared against the second competitor (C2). In this study, we determine whether there exists any difference between the two insurance carriers.
Compute the residuals using the results from problem 1. Verify that if you square and sum the residuals, you get 47, rounding to the nearest integer.
The demand for a product is 600 units per week, and the items are withdrawn at a constant rate. The setup cost for placing an order to replenish inventory is $25. The unit cost of each item is $3, and the inventory holding cost is $0.05 per item ..
for the given binomial sample size and null-hypothesized value of p0 determine whether the sample size is large enough
What is the probability of a fatal accident over a lifetime? Explain your reasoning carefully. Hint: Assume independent events. Why might the assumption of independence be violated?
If in fact the retailers are charging $51.95 on average, determine the nature of the decision made in the test. Type cd (correct decision), 1 (a Type I error was made) or 2 (a Type II error was made) as appropriate.
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