the highway has no evidence to support that:

What this means about the companies is there is no evidence that the claim the minivan gets 28 mpg on

95% CI = = (25.998, 27.442

First, I calculated the mean and standard deviation x=26.72, s=2.10, and n= 35

The confidence interval is given by CI=xtens

From t table at 95% confidence level and n-1=34 degree of freedom, t=2.032

Therefore:

CI=26.722.032352.10

= (25.998, 27.442) I am 95% confident that the population mean is between

25.9986 and 27.4414

Part 2: hypothesis Testing: Two-Tail Test and One-Tail Test

Calculating a Two-Tail Test

Replace this text with your response to the following in 75-150 words (1-2 paragraphs): List the null and alternative hypotheses for the two-tail test for the mean. Calculate the observed value of the test statistic and the associated p-value. Include your calculations. If your calculations are submitted separately, make note of where they can be found.

Interpreting the Two-Tail Test

Replace this text with your response to the following in 75-150 words (1-2 paragraphs): Is the observed test statistic inInterpreting the Two-Tail Test

the critical region?Is the p-value higher or lower than your alpha?

Replace this text with your response to the following in 75-150 words (1-2 paragraphs): List the null and alternative hypotheses for the one-tail test of the mean. Calculate the observed value of the test statistic and the associated p-value. Include your calculations. If your calculations are submitted separately, make note ofCalculating a One-Tail Test

where they can be found.

Interpreting the One-Tail Test

Replace this text with your response to the following in 75-150 words (1-2 paragraphs): Is the observed test statistic in the critical region?Will the p-value be higher or lower than your alpha?

Part 3: Conclusions

Methods

Replace this text with your response to the following in 150-225 words (2-3 paragraphs): What conclusions did you reach? What did you learn about the situation by using each method? Did one method offer more conclusive proof than another?

Replace this text with your response to the following in 75-150 words (1-2 paragraphs): List the null and alternative hypotheses for the one-tail test of the mean. Calculate the observed value of the test statistic and the associated p-value. Include your calculations. If your calculations are submitted separately, make note of Calculating a One-Tail Test where they can be found.