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Q1) Report of a study of seat belt use by drivers says, "Hispanic drivers were not considerably more likely than White/non-Hispanic drivers to over report safety belt use (27.4 vs. 21.1%, respectively; z = 1.33, P > 1.0." How do you know that P-value given is wrong? Determine the correct one-sided P-value for test statistics=1.33?
Q2) Another student, when asked why statistical significance appears so often in research reports, says, "Because saying that results are significant tells us that they cannot easily be explained by chance variation alone." Do you think that this statement is essentially correct? Explain your answer.
Q3) You read that statistical test at α=0.01 level has probability 0.14 of making a Type II error when specific alternative is true. Calculate the power of test against this alternative?
Use MegaStat's output for multiple regression to determine the multiple regression equation
The width of a confidence interval will be:
To test there is significant difference among the mean of income using ANOVA. A developer of real estate is considering investing in a shopping mall on the outskirts of Atlanta, Georgia.
The population of lengths of aluminium coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.20 inches. A sample of four metal sheets is randomly selected from a batch. What is the possibility that t..
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
Explain your answer to someone who is familiar with the t test for a single sample, but not with the t test for independent means.
Fifty raffle tickets are numbered 1 throughout 50, and one of them is drawn at random. What is the probability that the number is a multiple of 5 or 8? Consider the following "solution": Since 10 tickets bear numbers that are multiples of 5 and 6 ..
Multiple comparison procedures are going to be done using the Bonferroni method with = 0.05. The value of t** is 2.4667. Which of the following is the appropriate conclusion from carrying out these multiple comparisons?
Carry out suitable multiple comparison procedure to determine the source of the difference.
The population of IQ scores forms a normal distribution with mean of μ = 100 and a standard deviation of σ = 15. What is the probability of obtaining a sample mean greater than M = 105,
Based on the result, does there to be an overall perception of 1 minute that is reasonably accurate?
If p denotes the p -value of the corresponding hypothesis test, which of the following is true?
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