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A local health organization wants to test the improvement in noise-related health problems after the installation...

A local health organization wants to test the improvement in noise-related health problems after the installation of a noise barrier in Riverside, CA.Let μ_d be the mean reduction in the self reported-health problems before and after the installation of the noise barrier, where μ_d>0 implies a reduction in health problems after installation of the noise barrier. Which hypotheses are appropriate?

H_0: μ_d=0 and H_A: μ_d>0

H_0: μ_d=0 and H_A: μ_d≠0

H_0: μ_d=0 and H_A: μ_d<0

H_0: d=0 and H_A: d>0

A local health organization wants to test the improvement in noise-related health problems after the installation of a noise barrier in Riverside, CA. For each of n=100 people that live in Riverside, CA, next to I-91, the number of self reported-health problems has been recorded in a week before and after installation of a noise barrier. Which test should be used to answer the question?

One-sample test for population mean

Two-independent samples test for difference in means (with equal variances)

Two-independent samples test for difference in means (with unequal variances)

Paired test for mean difference
Math   Statistics-And-Probability   
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A local health organization wants to test the improvement in noise-related health problems after the installation of a noise barrier in Riverside, CA.Let μ_d be the mean reduction in the self reported-health problems before and after the installation of the noise barrier, where μ_d>0 implies a reduction in health problems after installation of the noise barrier. Which hypotheses are appropriate?

H_0: μ_d=0 and H_A: μ_d<0

A local health organization wants to test the improvement in noise-related health problems after the installation of a noise barrier in Riverside, CA. For each of n=100 people that live in Riverside, CA, next to I-91, the number of self reported-health problems has been recorded in a week before and after installation of a noise barrier. Which test should be used to answer the question

Paired test for mean difference

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