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An analysis of variances produces SSbetween treatments = 20 with dfbetween treatments = 2, and SSwithin treatments = 30 with dfwithin treatments = 15. For this analysis, what is the F-ratio?
Determine the z values for 29 and 34 hours. What percent of the garages take between 32 hours and 34 hours to erect?
The level of significance indicates the probability of rejecting a false null hypothesis.
When formulating the conclusion to the test, why is the phrase fail to reject the null hypothesis more accurate than the phrase accept the null hypothesis?
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
What is a p-value in testing hypothesis? How does this p-value help us to decide to/not to reject a Null hypothesis? What might happen if we do not use this p-value in particular, when we are rejecting a Null hypothesis?
Does lovastatin reduce the risk of heart attack? Researchers gave lovastatin to 2,325 people and an placebo to 2,081 people. the average age of both groups in 58 years.
Would you be willing to provide an example of both methods (step by step) described in your document for determining the forecast based upon the two different methods. Maybe just for one single city.
Use an alpha level of .01 and test the hypothesis that the two methods are producing the same mean.
Suppose the weight of a product is normally distributed with a mean of 1.5 and a variance of 0.2. What percentage of products will have weights within +/- 3 standard deviations? Critically discuss the lower and upper limits bounding 50% of product we..
Use a 0.05 significance level to test the claim that king-size cigarettes with filters have a lower mean amount of nicotine than the mean amount of nicotine in non-filtered king-size cigarettes.
What is the mean and standard deviation of the sampling distribution when we take all samples of size25?
Explain and give examples of how the particular outcomes of a study can suggest if a particular threat is likely to have been present.
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