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Five tests of ordinal level data are presented: the sign test, the median test, the Wilcoxon signed-rank test, the Wilcoxon rank-sum test, the Kruskal-Wallis analysis of variance by ranks.
Choose one of these tests and describe in your own words, the purpose of the test, any particular assumptions or limitations pertaining to the test, and provide an example where you could employ the test.
The article claims that the distributions of annual returns for both common stocks and long-term government bonds are bell-shaped and approximately symmetric. Assume that these distributions are distributed as normal random variables with the mea..
You want to create a 90% confidence interval for the true average number of yards per game he throws. What is the margin of error for this estimate?
The populations must all be normally distributed, what is meant by normally distributed?
In a binomial distribution n = 8 and π = 0.2. Determine the probabilities of the following events.
Determine the area under the standard normal curve that lies: (a) to the left of Z = -2.31 (b) to the right of Z = -1.47 (c) between Z = -2.31 and Z = -1.47 (d) between Z = 1.47 and Z = 2.31
A researcher wishes to forcast the proportion of fish in a perticular lake which is inedible due to pollution of the lake.
Statistical Hypothesis testing - Frequency distribution
Problem based on combinatory - how many different license plates are possible?
What quantitative method can be applied to help the Department make the decision? Outline how this method can be applied and explain how a qualitative method can also be applied to help the Department make the decision
Assume the population standard deviation is 1.2 hours. The standard error of the mean is:
Evaluate the data below using the Kruskal - Wallis Nonparametric Hypothesis Test. Explain why you chose this particular nonparametric test to analyze your data.
A drug company is considering marketing a new local anesthetic. The effective time of the anesthetic the company is currently producing has a normal distribution with an average of 7.5 minutes and a standard deviation of 1.2 minutes.
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