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1. Under what conditions should you use the Chi-Square Test to determine whether there is a difference between proportions of two independent populations?
2. Under what conditions should you use the Chi-Square Test to determine whether there is a difference between the proportions of more than two independent populations?
3. Under what conditions should you use the Chi-Square Test of Independence?
4. Under what conditions should you use the McNemar test?
5. What is a nonparametric procedure? Describe specifically when you would utilize a nonparametric test.
6. Under what conditions should you use the Wilcoxon sum rank test?
7. Under what conditions should you use the Kruskal-Wallis rank test?
The overall model statistically adequate at a 0.05 level of significance for predicting sale price(y)? For a moving average which is not true?
If, on the average, 20 orders are received by fax every two hours throughout the day, find the a. probability that a faxed order will arrive within the next 9 minutes.
In part b, the sample have greater variability than part a, but the sample sizes are unchanged. how does the larger variability affect the size of the standard error for the sample mean?
Do 1-sample t-test to see if people in Chicago have travelled to fewer states than people nationwide. Utilize the 10% (.10) level of significance.
Are the following statements a valid pair of null and alternative hypothesis?
During the past year, the mean sales of Wshington Reds in cases was 45,000 cases, and the standard deviaiton was 4,450. How many cases of Washington Reds should be brought to market? Assume the sales follow a normal distribution.
Kurt's Adventures, Inc. stock is quite cyclical. In a boom economy, the stock is expected to return 30% in comparison to 12% in a normal economy and a negative 20% in a recessionary period.
A computer is used and it is found that the P-value = 0.0016. What can you state about the sample (independent or dependent) and what can you conclude about the evidence?
How many students should be surveyed if a 90% confidence interval is desired and the margin of error is to be only 3%?
Brain cancer is a rare disease. In any year there are about 3.1 cases per 100000 od population. Suppose a small medical insurance company has 150000 people on its books.
After 1,000-trial simulation, examine statistical information generated and compare output of simulation with your findings in Problem .Briefly describe the significant similarities and differences.
The average monthly cost per household for groceries in kentucky is $625/mo with a standard deviation of $125/mo. The average age of the memebers in each of the households in Kentucky is 22.5 yr with a standard deviation of 5.175 yr. Which data se..
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