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1. An advantage of the permutation test over the t test for a difference in means is thatA. it gives accurate P-values even when the distributions are not normal.B. it tests a more general hypothesis.C. Both choices are true.
2. Permutation tests cannot be used forA. tests when we believe the two populations differ under the null hypothesis.B. matched pairs designs where we believe only random differences occur.C. testing relationships where the null hypothesis says no relationship exists.
3. Which is more accurate?A. a t distribution confidence intervalB. a bootstrap BCa intervalC. a bootstrap percentile interval
These can have a large impact on tenure and promotion decisions at many institutions. One particular instructor had ratings in 3 courses in one semester as given by the table below for the statement "The instructor is an excellent teacher.
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The correct set of hypotheses to test the effect of the bonus plan, the difference between the t and z distributions
The 95% prediction interval for a new patient with a 2-day cholesterol level of 220 is
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Mean threshold values and standard deviations for the three groups are given below. Normal probability plots showed the three populations were well approximated by the Normal distribution.
Describe and analyze your quantitative data and Briefly address the data analysis process.
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
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?
Solve the mean and standard deviation equations
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