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The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, and average U.S. driver takes 50,000 trips. (a) 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? (b) Why might a driver be tempted not to use a seat belt "just on this trip"?
A coin was flipped 100 times and came up heads 59 times and tails 41 times. The expected outcome was to land on heads or tails 50 times each.
At α = 0.05, is the correctness of the prediction different for the two types of cola drinkers?
A large internet retailer is studying the lead time (elapsed time between the time when the order is placed and the time it is filed). The table below gives the lead times (in days) for a random sample of recent orders.
There is a horse race with 12 horses competing. A gambler must rank the 12 horses for first, second, third and fourth place finishing.
All else being equal, what occurs to your confidence interval when you increase value of alpha?
Dr. Easy saw the scores from the MA-222 test and used the occasion to test the old adage that girls are smarter than boys on subjects tested by ACT.
What is the probability of this actually happening?
In you determine the GPA of 10 members of the class and then calculate the average, will the number you get necessarily be the same as the average GPA for the whole class? On what factors would you expect the reliability of the estimate to depend..
At the .10 significance level, can we conclude that there is a difference in the amounts quoted?
A lumber company has claimed that the standard deviation for the lengths of their 6 foot boards is 0.5 inches or less. To test their claim , a random sample of 17 six-foot boards is selected
The house of representatives has a very controversial bill that will be going to vote. To help formulate his strategy on how to get the bill passed, the chairman of the committee that has been studying the bill wishes to know if there is a divisio..
Describe the "third variable problem" as it relates to correlation and provide an example of how you might see this played out in your own field.
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