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The accounting department at Weston Materials, Inc., a national manufacturer of unattached garages, reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours to erect the Red Barn model.
Assume the assembly times follow the normal distribution.
1. Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
2. What percent of the garages take between 29 hours and 34 hours to erect?
3. What percent of the garages take 28.7 hours or less to erect?
4. Of the garages, 5 percent take how many hours or more to erect?
Perform the five-step hypothesis test on the data. - LORA - this is the portion I am responsible for based on using the nonparametric hypothesis testing.
Assume a sample of 400 American adults were taken. Show the sampling distribution of the proportion of adults who balance their checkbook at least once a month.
Explain finding value of test statistic for the given data also interpret the result. Can Mr. Ratter compute which the mean weight of the bags is less than 50 pounds.
Does lovastatin (a cholesterol-lowing drug) reduce the risk of heart attack? In a Texas study, researchers gave lovastatin to 2,325 people and an inactive substitute to 2,081 people (average age 58). After 5 years, 57 of the lovastatin group had s..
Students applying for admission to an MBA program must submit scores from the GMAT test, which includes a verbal and a quantitative component.
The amounts of money requested on home loan applications at Down River Federal Savings follow the normal distribution, with a mean of $70,000 and a standard deviation of $20,000.
Test the hypothesis that the annual incomes of Teachers in areas of more than 500,000 are significantly more than those in areas of less than 100,000. Use the 5% level of risk.
Jill wants to do her MBA in Statistics at a B.C. university. She applies to two universities that offer post-graduate degrees in Statistics.
A sample of students attending Southeast Florida University is asked the number of social activities in which they participated last week. The chart below was prepared from the sample data.
They wish to conduct a survey of their students and find a simple random sample of 50 Freshmen, 40 Sophomores, 35 Juniors, and 30 Seniors.
Find out the conditional probability for the given data. Illustrate what is the conditional chance that the selected person is male?
The Appliance Center sells a variety of electronics equipments and home appliances. For last four years the following quarterly sales (in $ millions) were recorded.
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