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As in ANOVA, we often want to carry out a multiple-comparisons procedure following a Kruskal-Wallis test to tell us which groups differ signi?cantly.29 Here is a simple method: If we carry out k tests at ?xed signi?cance level 0.05/k, the probability of any false rejection among the k tests is always no greater than 0.05. That is, to get overall signi?cance level 0.05 for all of k comparisons, do each individual comparison at the 0.05/k level. In Exercise 15.43 you found a signi?cant difference among the lengths of three varieties of the ?ower Heliconia. Now we will explore multiple comparisons.
(a) Write down all of the pairwise comparisons we can make, for example, bihai versus caribaea red. There are three possible pairwise comparisons.
(b) Carry out three Wilcoxon rank sum tests, one for each of the three pairs of ?ower varieties. What are the three two-sided P-values? (c) For purposes of multiple comparisons, any of these three tests is signi?cant if its P-value is no greater than 0.05/3 = 0.0167. Which pairs differ signi?cantly at the overall 0.05 level?
For a firm in a perfectly competitive market, the total revenue curve, TR, is unusually easy to draw. What will it look like? Draw TR in your figure. Remember that if you sell nothing, your revenue is zero. The price of the good is 2.20.
Consider the six reform proposals suggested by the authors at the end of this feature. Indicate why you believe each is either a good or a bad idea
LA Market p = 50 - Q The company estimates its total cost function to be: TC = 40Q. Calculate the following: a. quantity, total revenue and profit when the company maximizes its profit and charges the same price in both markets. b. quantity, total re..
How were the stakeholders affected - What initiated the change and how well has it been received or accepted, and why?
If there is a constitutional requirement to maintain a balanced budget, then during a recession when tax revenues are shrinking, the government will have to implement
Suppose Humphrey starts out with four pounds of food and seven gallons of water, while Lauren starts out with eight pounds of food and five gallons of water. Draw an Edge worth box that shows all possible allocations of these goods, and plot the endo..
Sun Ltd acquired on 1 July 2011 a AA% voting interest (and significant interest) in Sea Ltd for $BBB cash. There cord edidentifiable net assets and assumed liabilities of Sea Ltd as at the date of acquisition were represented by the following eq..
When the unemployment rate is high, we would expect that:
Data on prices of Apple and S&P 500 index and the Treasury Bill rate provided in the attachment, estimate the beta for Apple.
Most prices are:
assume that the government imposed a price floor on wages minimum wage in order to make sure that workers can earn a
Why does the economy constantly have depressions throughout its history?
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