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To qualify for police academy, candidates must score in the top 20% on a general ability test. The test has a mean of 300 and a standard deviation of 50. Find the lowest possible score a candidate can score and still qualify. Assume the scores are normally distributed.
Assume your statistics professor reports test grades as z-scores, and you got a score of 2.20 on the midterm exam. Write down a sentence explaining what that means.
Construct a 95% confidence interval for the difference in the proportions of women and men who have regular exercise programs.
While purchasing a home, location is everything. As a buyer, one should be aware of the cost of living in the area of choice, as well as expect a higher cost the closer to the center of town you get.
Once again, suppose that the standard deviation of the average or median is $5.00. Which is the probability that the average or median of the sample is greater than $22.50 but less than $25.00?
Compute the effect size with gender as the grouping variable and ADDSC as the dependent variable.
Of the adults in Jefferson County, 10 percent have had CPR training. For a randomly selected group of students from this county, how large will the group have to be in order for the probability that have as a minimum one group member has had CPR t..
Can you conclude that the information in the article is untrue? Use the 0.05 significance level. Determine the p-value and explain its meaning.
Clark Heter is an industrial engineer at Lyons Products. He would like to conclude whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced w..
Construct a 90 percent confidence interval for the proportion of all kernels that would not pop.
Illustrate the regression model and predict it. The following table shows the yearly maintenance costs for several cars, as well as their age.
Romance USA present reported that 11 percent of all books sold are of the romance genre. If a local bookstore sells 316 books on a given day
You are considering adding a new food product to your store for resale. Explain how many units of the new product should be purchased for resale.
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