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In the biathlon event of the Olympic Games, a participant skis cross-country and on four intermittent occasions stops at a rifle range and shoots a set of five shots.
If the center of the target is hit, no penalty points are assessed. If a particular man has a history of hitting the center of the target with 90% of his shots, what is the probability of the following?
a. He will hit the center of the target with all five of his next set of five shots.
b. He will hit the center of the target with at least four of his next set of five shots. (Assume independence.)
The standard deviation of this poll is 4%. What would be the standard deviation if the sample size were increased from 93 to 187?
Normal with a standard deviation of 0.3 inch. How does the diameter of an orange at the 67th percentile compare with the mean diameter?
If the alpha level is changed from a = .05 to a = .01, (a) What happens to the boundaries for the critical regions? (b) What happens to the probability of a type I error?
Calculate the probability of a type ii error for the following hypotheses when µ = 37:
It is really frustrating to run out of stock. Why wouldn't an organization always store large quantities of inventory to eliminate shortages and stockouts?
Standard deviation of 11.6 hours. what is the 99% confidence level for the mean number of hours that the population of high school students spent working each week?
One month of the true difference and with 95% confidence if the range of all the data is 6 years? Use the appropriate tables in your book.
There are four conditions/requirements that must be met in order to perform simple linear regression. For each of the conditions below, choose the technique that should be used to determine whether or not that the condition is met.(Each answer ma..
Set a value for the level of significance to be used in the test? After answering this question, what type of error would you suppose may result in that case?
Previous studies have indicated the standard deviation of annual earnings for college students is $850. How large a sample would need to be taken to estimate the mean for college students' annual earnings to within $200 with 99% confidence?
Use the normal approximation to the binomial to approximate the probability that a) exactly 96 flights are on time. b) at least 96 flights are on time.
Which measure of association do you use to compare the relationship between these variables? Why?
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