A new gasoline additive is supposed to make gas burn more cleanly and increase g

Question

A new gasoline additive is supposed to make gas burn more cleanly and increase gas mileage in the process. Consumer Protection Anonymous conducted a mileage test to confirm this. They took a sample of their cars, filled it with regular gas, and drove it on I-94 until it was empty. They repeated the process using the same cars, but using the gas additive. Using the data they found, they performed a paired t-test with data calculated as (with additive - without additive) with the following hypotheses: Null Hypothesis: D 0, Alternative Hypothesis: D < 0. If they calculate a p-value of 0.705 in the paired samples t-test, what is the appropriate conclusion? Question 20 options: 1) We did not find enough evidence to say there was a significantly positive average difference in gas mileage. The additive does not appear to be effective. 2) The average difference in gas mileage is greater than or equal to 0. 3) We did not find enough evidence to say the average difference in gas mileage was not 0. The additive does not appear to have been effective. 4) We did not find enough evidence to say there was a significantly negative average difference in gas mileage. The additive does not appear be effective. 5) The average difference in gas mileage is significantly less than 0. The average gas mileage was higher without the additive.

Explanation / Answer

Since p value is very high, we do not reject Ho and hence,

We did not find enough evidence to say there was a significantly negative average difference in gas mileage. The additive does not appear be effective.

Option 4 is correct.

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.