17. In the year 2000, the average car had a fuel economy of 20.62 MPG. You are c

Question

17. In the year 2000, the average car had a fuel economy of 20.62 MPG. You are curious as to whether this average is less than today. The hypotheses for this scenario are as follows: Null Hypothesis: 20.62, Alternative Hypothesis: < 20.62. You perform a one sample mean hypothesis test on a random sample of data and observe a p-value of 0.989. What is the appropriate conclusion? Conclude at the 5% level of significance.

Question 17 options:

1)

2)

3)

4)

5)

1)

We did not find enough evidence to say the true average fuel economy today is greater than 20.62 MPG.

2)

The true average fuel economy today is significantly less than 20.62 MPG.

3)

We did not find enough evidence to say a significant difference exists between the true average fuel economy today and 20.62 MPG.

4)

We did not find enough evidence to say the true average fuel economy today is less than 20.62 MPG.

5)

The true average fuel economy today is greater than or equal to 20.62 MPG.

Explanation / Answer

as our p value is less then 0.05 level; we fail to reject null hypothesis

therefore correct conclusion is

4)

4)

We did not find enough evidence to say the true average fuel economy today is less than 20.62 MPG.

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