The Forest Management Institute Is Conducting a Test,which Involves Measuring

question 80

Multiple Choice

The Forest Management Institute is conducting a test,which involves measuring the size of trees by photographing from helicopter rather than actual field measurement.This process is especially important in forest areas accessible only by helicopter.A sample of 31 trees measured by aerial photography had a sample standard deviation of 2.24.A 95 percent confidence interval for the population variance is represented by the values:

• A) 30(2.24)/ 46.979 and 30(2.24)/ 16.791.
• B) 30(2.24²)/ 46.979 and 30(2.24²)/ 16.791.
• C) 31(2.24)/ 16.791 and 31(2.24)/ 46.979.
• D) 31(2.24²)/ 46.979 and 31(2.24²)/ 16.791.
• E) 30(2.24)/ 16.791 and 30(2.24)/ 46.979.

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