Eight Hybrid Cars Are Used to Determine If There Is

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The Answer is a. Wilcoxon signed-rank test.
b. Yes. The data are appropriately paired. We assume that the cars are randomly selected and both distributions are symmetric.
c. Let the difference be d = With Additive - Without Additive.
H0: The median difference in (l/100km) with and without the additive is zero.

a. Wilcoxon signed-rank test. b. Yes. The data are appropriately paired. We assume that the cars are randomly selected and both distributions are symmetric. c. Let the difference be d = With Additive - Without Additive. H0: The median difference in (l/100km) with and without the additive is zero. HA: The median difference in (l/100km) with and without the additive is not zero. d. We get T- = 32.5 and T+ = 3.5, therefore the test statistic value is 3.5. The critical value from the table W2 is 6. We reject the null hypothesis and conclude that the median difference in (l/100 km) with and without the additive is different from zero. Thus, there is a difference in fuel consumption (l/100 km) with and without a particular additive.

HA: The median difference in (l/100km) with and without the additive is not zero.

d.

We get T- = 32.5 and T+ = 3.5, therefore the test statistic value is 3.5. The critical value from the table W2 is 6. We reject the null hypothesis and conclude that the median difference in (l/100 km) with and without the additive is different from zero. Thus, there is a difference in fuel consumption (l/100 km) with and without a particular additive.

Eight Hybrid Cars Are Used to Determine If There Is

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Eight Hybrid Cars Are Used to Determine If There Is

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