Author Question: To compare the effectiveness of two kinds of bumper guards, two independent random samples of six ... (Read 47 times)

markburs · **on:** Feb 26, 2023

To compare the effectiveness of two kinds of bumper guards, two independent random samples of six compact cars were outfitted with one of the two guards (6 cars with type 1 and 6 cars with type 2). Then, each car was run into a concrete wall at 5 mph. The average damage estimate for guard 1 was $1440. We know that the population variance of damage using bumper type 1 is 3632. The guard 2 sample had an average of $1490. We know that the population variance of damage using bumper type 2 is 2020. If we assume the populations are normally distributed, does it appear that the guards differ in effectiveness? Select the correctp-value and decision and state the null hypothesis. Useα= 0.05.

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p-value = 0.1032; fail to rejectH₀; The null hypothesis is that the guards are equally effective.

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p-value = 0.0516; fail to rejectH₀; The null hypothesis is that the guards are not equally effective.

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p-value = 0.0516; rejectH₀; The null hypothesis is that the guards are not equally effective.

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p-value = 0.9894; fail to rejectH₀; The null hypothesis is that the guards are equally effective.

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

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