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A dishwasher has a mean life of 10 years with an estimated standard deviation of 1.25 years. Assume the life of a dishwasher is normally distributed.
A.) Find the probability that a dishwasher will last between 8 and 10 years.
B.) A manufacturer of dishwashers only wants to replace free of charge 5% of all dishwashers. How long should the manufacturer make the warranty period?
A random sample of 3,500 people was chosen, and 421 were found to be unemployed. Do you believe that the government projects reduced the unemployment rate?
The MBASAL file contains the salary offer (in thousands of dollars) received by each member of a sample of 50 MBA students who graduate from the graduate school of management at Rutgers
the alphacor company experiences some type of failure on its computer network on average once every 4 hours. assume
Is there any evidence to suggest that the true mean weight of these round hay bales is less than 1600 pounds? Use a = 0.01 and compute the p value to draw a conclusion.
The Water Authority informs Margaret that for a special fee of $6,000 this year, her farm will qualify for an additional allotment of 600 acre-feet of water. How should she respond?
you are required to provide a portfolio of 3000 words comprising two equal elements as followspart onethis will
(i) Construct a frequency distribution & relative frequency distribution for the above data with 7 classes.
Sports and Leisure The National Football League rates each quarterback after every game according to a formula that involves pass attempts, passing yards.
To determine the total amount of error in all students' bills, a large university selects 150 accounts for a special check of accuracy.
An independent financial advisor claims an average rate of return, μ, on a particular investment is at least 7%. In testing her claim, the correct pair of hypotheses is:
A friend, who knows that you are almost finished with this book, comes to you for advice on a statistical analysis.
Identify the independent and dependent variables in the following descriptions of experiments:- Students watched a cartoon either alone or with others and then rated how funny they found the cartoon to be.
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