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Shory's Muffler advertises it can install a new muffler in 30 minutes or less. However, the work standards department at corporate headquarters recently conducted a study and found that 20 percent of the mufflers were not installed in 30 minutes or less. The Maumee branch installed 50 mufflers last month. If the corporate report is correct:
a) How many of the installations at the Maumee branch would you expect to take more than 30 minutes?b) What is the likelihood that fewer than eight installations took more than minutes?c) What is the likelihood that 8 or fewer installations took more than 30 min?d)What is the likelihood that exactly 8 of the 50 installations took more than 30 min
In a clinical study of an allergy drug, 115 of the 204 subjects reported experiencing significant relief from their symptoms. At the 0.01 significance level, test the claim that more than half of all those using the drug experience relief.
Can you think of an example where the analysis of variance (ANOVA) can be used? How is ANOVA being used in the workplace, or how should it be used?
20% of their income tax returns are audited. Of five randomly chosen individuals, what is the probability that none will have their returns audited?
For this purpose, a random sample of 55 plots, each of size 100 square meters, is used. The number of ferromagnetic artifacts for each plot is determined.
The manager of a Farmer Jack Super Market would like to know if there is a preference for the day of the week on which customers do their shopping.
At one Las Vegas casino, if you net $5 that a 12 will come up as the total points on two dice, and you win, you will get back $50. If any total other than 12 comes up, you get back $0.
Using the sample obtained, draw a histogram and calculate mean and variance for 1000 sampled values for random variable Y = X2.
How many men and women are needed to generate a 95% confidence interval estimate for the difference in proportions with a margin of error not exceeding 4%?
That contains 18 red, 18 black, and 2 green slots. A ball is rolled 25 times. Find the probability that the ball does not fall into any green slot?
A random sample of stipends of teaching assistants in economics is listed below. Is there sufficient evidence at the alpha=.05 level to conclude that the average stipend different from $15,000? The data is listed below:
A manager of a gasoline filling station is thinking about a promotion that she hopes will bring in more business to the full-service island. She is considering the option that when a customer requests a fill-up
Dr Johnson wants to know if there is sufficient evidence to conclude that the grade distribution of his class is different than the historical grade distribution.
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