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FA25_QTM_100_3 Final Exam- Requires Respondus LockDown Browser

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Forty-five families are randomly selected and their daily water usage (in gallons) before and after viewing a water conservation video is measured. What is the appropriate null hypothesis to determine if the mean amount of water conserved between the before and after measurements significantly differs.

Options
A.𝐻 0 : 𝜇 𝑑 ≠ 0
B.𝐻 0 : 𝜇 = 0
C.𝐻 0 : 𝜇 𝑑 = 0
D.𝐻 0 : 𝜇 0 ≠ 0
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Step-by-Step Analysis
The scenario involves before-and-after measurements on the same families, which creates paired data. The key question is whether the average difference between after and before measurements is zero, i.e., whether the video had no effect on mean water usage. Option 1: H0: μ_d ≠ 0 This statement proposes that the mean difference is not equal to zero. It specifies a two-sided alte......Login to view full explanation

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