1."Conservationists have despaired over destruction of tropical rain forest by logging, clearing, and burning." These words begin a report on a statistical study of the effects of logging in Borneo. The study conducted compared the number of tree species in unlogged forest plots to similar plots logged 8 years earlier. Independent random samples of both logged and unlogged plots were analyzed and the number of tree species was recorded.^a The data are stored in the SPSS data file named Tree Species. Suppose we want to answer the following question: (i) Test, at the 2% level of significance, whether the mean number of species in a logged forest plot is different than that found in an unlogged forest plot. Assume the population standard deviations for logged and unlogged plots are the same.

(a)Use SPSS to produce the information needed to perform the hypothesis test in part(i) and then fill in the missing information in Tables 1 and 2.

Table 1

29 Logged 11.00 30 Logged 15.00 31 Logged 20.00 32 Logged 9.00 33 Logged 8.00 34