What test is to be used considering variables and direction? Why is this the correct test? State null and alternative hypothesis. What is your test statistic and critical value based on alpha. Perform the test showing all work. Reject or do not reject the null based on results using proper stats language. .. A biologist is interested in understanding how wildfire affects the diversity of flowering plants in the understory of longleaf pine in the southeastern US. The biologist randomly selected 14 sites in different longleaf pine forests and established 1 acre plots at each site. During the Spring, the biologist measured the number of flowering plant species in each plot as a measure of diversity. The following Fall, the biologist and the research team set prescribed fires to burn the understory vegetation in each plot. Then the biologist measured flowering plant diversity in the plots the next Spring. The resulting data are shown below. The result of all shapiro-wilk tests for these data were p< 0.05. Test whether the wildfire treatment had an effect on flowering plant diversity, using a -0.05. Site Pre-burn Post-burn Forest A 31 45 Forest B 28 33 Forest C 42 38 Forest D 37 37 Forest E 27 35 Forest F 34 32 Forest G 25 41 Forest H 35 29 Forest I 19 25 Forest J 29 30 Forest K 26 41 Forest L 33 37 Forest M 31 31 Forest N 23 29

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Confidence Intervals

When we calculate intervals in probability and statistics, it can be simply termed as finding out a confidence interval. The confidence interval is usually calculated from the data set which is observed. The value of the parameter that needs to be calculated is present here only.