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If the alpha level is changed from α = 0.05 to α = 0.01,
1. What happens to the boundaries for the critical regions?
2. What happens to the probability of a Type1 error?
Calculate sample proportion and then also calculate a 99% confidence interval for true population proportion, p.
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Describe your re..
Suppose that data is recorded for equal period of "before"-"after" time. Use 1% level for risk. Given processed data, explain what John must do.
You run a two tail t-test. The critical value for this test at the .05 level is a t of 7.82. What value must the obtained t-test statistic be in order to be considered significant at the .05 level?
What is the probability that he completed the assignments?
A researcher was interested in determining whether incentives affect the response rate in surveys. A simple random sample of 50 adult residents of a large city was selected. All were mailed a survey and promised a check upon returning a completed ..
Calculate a 99% confidence interval for the true mean difference between pretreatment and after treatment testosterone levels of young male TBI patients.
Provided that the selected student excels in sports, determine the probability that the student is a boy?
Assuming the sample size of 40 can be considered as large, compute the confidence interval for a confidence level of 90%.
Given that P (A) = 0.7, P (B) = 0.5, and P (A B) = 0.8. Find the following probabilities:
Conduct post hoc comparisons with the LSD method. Which groups differ significantly at α = 0.05?
A company auditor was interested in estimating the total number of travel vouchers that were incorrectly filed. In a SRS of size n =50 oft of the group of N = 250, were filed incorrectly.
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