Hand calculate

7. "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. Here are data on the number of tree species in some unlogged forest plots and similar plots logged 8 years earlier. Plots were randomly seiected. Unlogged 22 18 22 20 Logged 17 4 18 1. State the null hypothesis and the alternate hypothesis. 2. The study report says: "Loggers were unaware that the effects of logging would be assessed.\" Explain why is this important. 3. Handwri e the calcu ations for a two sample difference of means test. Use SVE. Scan or take a photo of your handwritten work. 4. Use SPSS for the two sample difference of means calculations. Submit the SPSS output as PDF. 5. Based on your calculations, did logging signicantly reduce the mean number of species in a plot after 8 years? Use the 95% condence level to evaluate this hypothesis. Do you reject the null hypothesis? 6. Write a results statement