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A survey of eight hundred male office workers found that 17% of them work more than 50 hours per week. What is the 98% confidence interval for the true proportion of male office workers who work more than 50 hours per week?
The weight of a product is normally distributed with a mean of four ounces and a variance of .25 "squared ounces." What is the probability that the randomly selected unit from a recently manufactured batch weighs no more than 3.50 ounces.
Is it reasonable to compute that the mean of the population is actually $15,000.
What is correlation analysis? How can correlation analysis be used in a business decision or examples specifically related to strategy formulation and implementation?
As we can say there is 5.5 percent chance of seeing the current policy having an effect on smog in the results we observed from natural sampling variation.
A statistics practitioner conducted a two-factor analysis of variance experiment with a =4, b = 3, and r = 8. The sum of squares are listed here:
If HIV virus is actually present, the probability that ELIA test will give a positive result from ELISA is .01. If ELISA has given a positive result, use the Bayes' theorem to find the probability that the HIV virus is actually present.
Is the z value positive or negative? Explain why it should be positive or negative.
Barbara Flynn is in charge of maintaining hospital supplies at General Hospital. During the past year, the mean lead time demand for bandage BX-5 was 60 (and was normally distributed).
The width of a confidence interval is equal to twice the value of the margin of error. Explain your answer. What is the first step in hypothesis testing?
Researcher asked group of 30 students - 12 of them supported change, 13 of them didn't, and 5 had no opinion. This is not binomial model as?
Convincing evidence to support the claim that fewer than half of adult Americans can name at least one justice currently serving on the Supreme Court.
You buy a new piece of equipment for $11,778 and you receive a cash inflow of 2,000 per year for 10years. What is the internal rate of return?
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