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 12 unlogged forest plots and 9 similar plots logged 8 years earlier:

Use the data to give a 90% confidence interval for the difference in mean number of species between unlogged and logged plots. Compute degrees of freedom using the conservative method.

Interval: _____ to ______ .

Transcribed Image Text:

Unlogged 22 18 22 20 15 21 13 13 19 13 19 15 Logged 174 18 14 18 15 15 10 12 Unlogged 22 18 22 20 15 21 13 13 19 13 19 15 Logged 174 18 14 18 15 15 10 12

Answer rating: 100% (QA)

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