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a) What is the purpose of a Wilcoxon signed-rank test? Explain.
b) The Wilcoxon signed-rank test resembles which parametric test(s)? Explain.
c) What is the purpose of a Kruskal-Wallis test? Explain.
d) The Kruskal-Wallis test is analogous to which parametric test? Explain.
After performing a two sample t-test, you see a p-value of 0.0355. Of the following, which is the appropriate conclusion?
Does this data indicate that the sentiment for increasing the speed limit is different for the two groups of residents? Let p1 refer to the urban population.
Construct a 95% confidence interval for the proportion of all those who experience some type of discomfort.
The consequences of the central limit theorem is that if we end up averaging the measurements of a particular quantity, the distribution of an average tends on going toward a normal one?
What is the probability that there are less than 500 nails in a randomly selected five pound box of nails?
A certain company relies heavily on phone orders. Suppose past records show that R% of all incoming phone calls to this company are orders from customers.
In a sample of 1,000 representing a survey from the entire population, 650 people were from Laketown, and the rest of the people were from River City.
Find out the probability that a student from the whole school system, chosen at random, has passed?
Obtain a test statistic and p-value assuming equal variances. Interpret these results.
A clothing retailer wishes to investigate the relationship between order size (in dollars) and the level of satisfaction of the customer.
what is the post-test probability of disease being present in a patient with a positive test result for test A if a cutoff value of 4.0 mg/ml is chosen?
When using past data, I have found that the proportion of items rejected by quality control personnel is about 3%. We normally make 5000 items per day. For a p chart, what are the upper and lower control limits?
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