Author Question: To test the effects of acid rain on the growth of white pine trees, a conservationist measures the ... (Read 79 times)

Deej · **on:** Feb 26, 2023

Question 1

The selection of the null and alternative hypotheses always follows what the experimenter expects or wants to see.

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True

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False

Question 2

To test the effects of acid rain on the growth of white pine trees, a conservationist measures the diameter (in centimeters) of 200 white pines in the Allegheny National Forest in northwest Pennsylvania. The average diameter of the sampled trees is 23.42 cm. Does the sample provide sufficient evidence to conclude that the current mean diameter of the white pines is less than that recorded 50 years ago (μ= 24.8) if the standard deviation is 6 cm? Calculate thep-value and make an appropriate decision. (Useα= 0.05).

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p-value = 0.9994; fail to rejectH₀

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p-value = 0.0006; rejectH₀

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p-value = 0.0006; fail to rejectH₀

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p-value = 0.9994; rejectH₀

jojomac20 · **Reply #1 on:** Feb 26, 2023

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