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A realtor wants to compare the average sales-to-appraisal ratios of residential properties sold in four neighborhoods (A, B, C, and D).Four properties are randomly selected from each neighborhood and the ratios are recorded for each, as shown below.
Neighborhood
(Sales-to-Appraisal Ratio)
Home A B C D
1 1.2 2.5 1.0 0.8
2 1.1 2.1 1.5 1.3
3 0.9 1.9 1.1 1.1
4 0.4 1.6 1.3 0.7
(a) Calculate the among groups degrees of freedom?
(b) Calculate the among blocks degrees of freedom?
(c) Calculate SST?
(d) Calculate SSA?
(e) Calculate SSBL?
(f) Calculate SSE?
(g) Calculate MSA?
(h) Calculate MSBL?
(i) Calculate MSE?
(j) At a 0.05 level of significance, determine if the mean ratios for the four neighborhoods are the same?
A sample is taken prior to a major election of likely voters. The null hypothesis is that the votes will be split 50/50. One candidate gets 54% of the support in the sample and the p-value for this sample is calculated to be 0.12.
Assume you randomly sample one mouse from the colony. The probability his age will be between 55 and 70 days is?
Calculate the appropriate test statistic to test the hypotheses related to the concern and test at 5% and 1% (indicate which test you are performing; show the hypotheses, the test statistic and the critical values and mention whether one-tailed or..
Find the probability that the number who say oatmeal is their favorite cookie is (a) exactly four, (b) at least four, and (c) less than four.
As part of a study of corporate employees, the Director of Human Resources for PNC, Inc. wants to compare the distance traveled to work by employees at their office in downtown Cincinnati with the distance for those in downtown Pittsburgh.
At the .05 significance level, is there a difference in the mean number of miles traveled per month between Cincinnati and Pittsburgh employees? Use the five-step hypothesis-testing procedure.
The test question was if this difference between the test statistics and the stated life of the battery was significant? The .05 significant level was selected for the test. Which is the correct statement?
A company producing a standard line and a deluxe line of dishwasher has the following time requirements (in minutes) in departments where either model can be processed
A location along a 500 foot assembly line from which to observe the work habits of the workers on the line. What is the probability that the point she selects: is within 25 feet of the end of the line.
How many samples would be needed to create a 99 percent confidence interval that is within 0.02 of true proportion of premium grade fuel-quality failures.
Given the following frequency distribution, find out the mean, variance, and standard deviation.
What is the type of test of significance? 2. Indentify the null and alternative hypothesis. 3. which hypothesis is the claim? 4.What's the test statistic?
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