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A small business just leased a new computer and color laser printer for three years. The service contract for the computer offers unlimited repairs for a fee of $100 a year plus $25 service charge for each repair needed. The company's research indicates that during a given year 86% of these computers need no repairs, 9% need to be repaired once, 4% twice, 1% three times, and none required more than three repairs. What is the standard deviation of the company's annual expense with service contract for the computer?
Suppose that the National Labor Relations Board (NLRB) wishes to estimate the average hourly wage rate for a certain classification of skilled workers. It wishes to be 95% certain to get an estimate of sample mean within 0.05 of the truth.
an aeroplane flies from a to b at the rate of 500kmhr and comes back from b to a at the rate of 700kmhr. what is the
normal distribution with the mean of 72,000 miles and a standard deviation0f 13,000 miles. What percentage of the transmission will be good for more than 100,000 mile?
Standard deviation of 2.5 inces approximately what percentage of american women are taller than 58.5 inches, but shorter than 68.5?
Set up the null and alternative hypotheses to see if the data show that it does indeed take seniors longer than 15 seconds to cross the street. In terms of traffic flow, what are the implications of a Type I error?
The Human Relations Department of Electronics Inc. would like to include a dental plan as part of the benefits package. The question is: How much does a typical employee and his or her family spend per year on dental expenses?
If writing scores for population have standard deviation of σ = 20, does sample give adequate evidence to conclude that new composition course has significant effect?
you are picking a bouquet of 20 flowers for your mother at random from a garden with 25 coneflowers 35 daisies and 42
Create a graph and draw the regression line based on these two pairs of scores, plus the X value 1 1 and its predicted score on Y.
Statistics means never having to say you"re certain." What defines the cohort? All patients from a particular healthcare plan?
assume you have any given amino acid sequence. the average length of an non-helical region is 20 amino acids long.
a box contains one twenty-dollar bill and four one-dollar bills. two bills are randomly chosen one at a time without
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