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A survey by day times found that u.s men work a mean of 52 hours a week. Assume the survey used a sample of 650 men and that the sample standard deviation was 8.2 hours. What is the 95% confidence interval for the mean number of hours worked per week for the population of u.s men?
A study of 36 members of the Central Park Walkers showed that they could walk at an average rate of 2.6 miles per hour. The sample standard deviation is 0.4. Find the 95% confidence interval for the mean for all walkers.
IS there any evidence that a freshman's chances to graduate may depend upon what kind of high school the student attended? Describe.
Some authorities claim that globalization has led to greater income inequality in the U.S. and globally while others claim that inequality is due to improvements in technology and productivity. Using the Library and Internet sources, do the follow..
Carry out suitable multiple comparison procedure to determine the source of the difference.
The owner of a fish market has an assistant who has determined that the weights of catfish are normally distributed, with a mean of 3.2 pounds and a standard deviaition of 0.8 pound.
Compute the 95% confidence and prediction intervals for values of y for X = 40. Determine correlation coefficient, Interpret.
For these 4 questions below what would be the independent and dependent variables, the level of measurement and whether or not the variable is discrete or continuous.
Find the probability of drawing either a king or a spade in a single draw from a pack of 52 playing cards.
Give an example of how Regression Analysis can be used in your work to make a business decision. Give the dependent and independent variables.
A Tire company has developed a new type of tire. Extensive testing shows that the number of miles the new tire will run before wearing out is normally distrubuted with a mean of 40,000 miles and a standard deviation of 4,000 miles
A business owner decides to use a binomial distribution to solve one of his problems.
Reis, Inc., a New York real estate research firm, tracks the cost of apartment rentals in the United States. In mid-2002, the nationwide mean apartment rental rate was $895 per month
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