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What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test. Under what conditions should you use the Wilcoxon sum rank test? Under what conditions should you use the Kruskal-Wallis rank test?
Problems on Sampling Variability and Standard Error and Confidence Intervals
If there is a difference between the two groups of scores. Briefly explain how the difference may have been caused by the treatments.
What about floor and ceiling effects? How can these issues preclude a significant correlation coefficient from being discovered?
The data show the total number of medals (gold, silver, and bronze) won by each country winning at least one gold medal in the 2006 Winter Olympics. Find the mean, median, and mode of the numbers of medals won by these countries.
List all outcomes corresponding to the five smallest possible values of Y, and state which Y value is associated with each one.
What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?
The scatter diagram for data set below is shown. a) given that x= 3.667, sx = 2.5819889, sy= 1.5937377 and r= -0.8894261, find out least -regression line.
The manufacture of the X-15 steel belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles.
The college theater department recently staged a production of a modern musical. A researcher recorded the gender of each student entering the theater and found a total of 385 females and 215 males.
What is the probability that a consumer buys a can whose contents are actually less than the stated weight of 16 oz.?
Consider the following statement and discuss its implications. 'It is possible for a statistically significant result to be of no particular practical significance, depending on the context of the analysis.'
Let p represent the population proportion of all numbers in the corporate file that have a first nonzero digit of 1. What is the value of the sample test statistic? (Round your answer to two decimal places.)
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