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Q1) Accounting department at Weston Materials, Inc., national manufacturer of unattached garages, reports that it takes 2 construction workers a mean of 32 hours and a standard deviation of 2 hours to erect Red Barn model. Suppose the assembly times follow normal distribution.
a) Find out the z values for 29 and 34 hours. What percent of garages take between 32 hours and 34 hours to erect?
b) Determine percent of the garages take between 29 hours and 34 hours to erect?
c) Determine percent of garages take 28.7 hours or less to erect?
d) Of the garages, 5 percent take how many hours or more to erect?
Write a one-page report to Ms. Gupta presenting your conclusions regarding the market performance of Brand 1.
For thefts involving more than $1,000, there is an inverse relationship between the value of the goods stolen and the length of the prison sentence given to the thief.
Below you are given a partial computer output based on a sample of 16 observations.
A major study examined the relationship between cause of death (heart attack, cancer, stroke, accident, etc.) and age. A good way to graphically represent the relationship is with
What is the likelihood the sample mean is greater than $22.50 but less than $25.00?
One of the most important uses of a correlation is its potential use in_________
To determine whether there exists mean difference among the groups:
Let p represent the proportion of registered voters in the state that would vote for the Republican candidate. The standard error for the proportion of those who phoned in who answered "yes" is
Construct a 95 percent confidence interval for the population mean. Is it reasonable that the population mean is 28 weeks? Justify your answer.
The 99% confidence interval estimate for a population variance when a sample standard deviation of 12 is obtained from a sample of 10 items is:
If random sample of thirty six customer transactions points out that sample mean withdrawal amount is $172, is there evidence to think that population mean withdrawal amount is no longer $160? Determine the mean of data above?
What percent of sales representatives earn more than $42,000 per year?
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