Rank sum Question using JMP 14.0 - I would like to check my answers against people who know What they are doing. I have no experience using JMP software.
In the interest of time, I'm only asking you do use the rank sum test (and not the two samplet test). Keep in mindthat I did a two samplet test problem by hand on the first day of class, and I did a two samplet test with SAS in class recently. Giventhat you should have seen all of this in at least one prior class, and probablytwo prior classes, that should be enoughtomakethetwo samplettest fair gamefor the first exam "Conservationists have despaired over destruction of tropical rainforest by logging, clearing, and burning." These words begin a report on a statistical study of the effects of logging in Borneo. Here are data on the number of tree species in 12 unloggedforest plots and 9 similar plots logged 8 years earlier: Unlogged 22 18 22 20 15 21 13 13 19 13 19 15 Logged 17 418 1418 15 15 10 12 1. Do these samples provide evidence that unlogged plotstendto have more tree species, on average, in the populations? Usethe rank sum test regardless of what you conclude in step 2. Use SAS, and provide SAS code and output to support your work. Do not supply output that you do not referto. You obviously will needto get the data into SAS, which we havetalked about in class. 2. Compute the rank sum test statistic by handfor these data. Show all work. 3. Explain how the test statistic in #2 summarzes the evidence against Ho. In other words, what values of thetest statistic provide strong evidence against Ho, and what values provide weak evidence against Ho? Explain why, and show all work. In the interest of time, I'm only asking you do use the rank sum test (and not the two samplet test). Keep in mindthat I did a two samplet test problem by hand on the first day of class, and I did a two samplet test with SAS in class recently. Giventhat you should have seen all of this in at least one prior class, and probablytwo prior classes, that should be enoughtomakethetwo samplettest fair gamefor the first exam "Conservationists have despaired over destruction of tropical rainforest by logging, clearing, and burning." These words begin a report on a statistical study of the effects of logging in Borneo. Here are data on the number of tree species in 12 unloggedforest plots and 9 similar plots logged 8 years earlier: Unlogged 22 18 22 20 15 21 13 13 19 13 19 15 Logged 17 418 1418 15 15 10 12 1. Do these samples provide evidence that unlogged plotstendto have more tree species, on average, in the populations? Usethe rank sum test regardless of what you conclude in step 2. Use SAS, and provide SAS code and output to support your work. Do not supply output that you do not referto. You obviously will needto get the data into SAS, which we havetalked about in class. 2. Compute the rank sum test statistic by handfor these data. Show all work. 3. Explain how the test statistic in #2 summarzes the evidence against Ho. In other words, what values of thetest statistic provide strong evidence against Ho, and what values provide weak evidence against Ho? Explain why, and show all work
