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Are there significant interaction effects between simvastatin-niacin and antioxidants? What does an interaction effect mean in the context of this trial?
1.an advantage of the permutation test over the t test for a difference in means is thata.it gives accurate p-values
The annual salary of an electrical engineer is given in terms of the years of experience by the table below. Find the equation of linear regression for the above data and obtain the expected salary for an engineer with 45 years of experience.
1. approximately 22 of 1000 fish in a pond are infected with a skin disease. a random sample of 20 fish is selected.
Analyze whether the factors of totwrk, educ, and age are enough factors to explain the variation in sleep. Explain which additional factors should be explored in order to explain the variation in sleep. Provide your reasoning.
For the binomial sample information summarized below, indicate whether the sample size is large enough to use the large sample approximation to construct a confidence interval for p.
The probability that home sales will increase in the next 6 months is 0.25. The probability that the interest rates on loans will go up in the same period is estimated to be 0.74.
why would we use a matched-pairs design and what is an example where this would
State the appropriate null and alternative hypothesis for testing the standard regarding the mean value. Test the hypothesis using a significance level equal to 0.05. What assumption will be required?
With 95% confidence, what is the margin of error (to 2 decimals)? What is the 95% confidence interval estimate of the population mean?
write a problem which requries the reader to calculate standard scores also called a z-scores and use these to find
Assume the observed value of the test statistic is 1.53. What is the smallest level for which there is sufficient evidence to reject H 0 (i.e. the p-value for this test)?
If 485 out of the next 500 orders are processed on the same day, would this prove that they are exceeding their goal, using α = .025?
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