Wednesday

August 20, 2014

August 20, 2014

Posted by **Nicole** on Sunday, April 15, 2012 at 6:03pm.

The following questions pertaining to the data above I need answered are:

Identify the design of the study.

A. paired t-test of a mean

B. two-sample t-test of means

C. either test will work

Suppose that you want to perform a hypothesis test to determine whether, on average, EES reduces CO emissions.

What null hypothesis would you use to test if the MAGNETIZER reduces emissions?

A. H0: μ (before MAGENTIZER) = μ (after MAGNETIZER)

B. H0: μ (before MAGENTIZER) ≠ μ (after MAGNETIZER)

C. H0: μ d = 0 where μ d = μ (before MAGENTIZER) - μ (after MAGNETIZER)

D. H0: μ d ≠ 0 where μ d = μ (before MAGENTIZER) - μ (after MAGNETIZER)

Suppose that you want to perform a hypothesis test to determine whether, on average, EES reduces CO emissions.

What alternative hypothesis would you use to test if the MAGNETIZER reduces emissions?

A. HA: μ (before MAGENTIZER) = μ (after MAGNETIZER)

B. HA: μ (before MAGENTIZER) > μ (after MAGNETIZER)

C. HA: μ d > 0 where μ d = μ (before MAGENTIZER) - μ (after MAGNETIZER)

D. HA: μ d ≠ 0 where μ d = μ (before MAGENTIZER) - μ (after MAGNETIZER)

E. HA: μ d < 0 where μ d = μ (before MAGENTIZER) - μ (after MAGNETIZER)

Using the data provided, conduct the hypothesis test. What p-value do you obtain?

A. 0.0062

B. 0.0039

C. 0.9961

D. 0.0148

Using the p-value you obtained in the previous question and assuming that you are testing at the 0.01 significance level, what is your conclusion?

A. Reject HO: The MAGNETIZER appears to reduce emissions

B. Reject HO: The MAGNETIZER does not appear to reduce emissions

C. Do not reject HO: The MAGNETIZER appears to reduce emissions

D. Do not reject HO: The MAGNETIZER does not appear to reduce emissions

What is the lower bound for the 99% confidence interval for the change in emissions following the installation of the MAGENTIZER system (before - after)? Show two decimal places in your answer

What is the upper bound for the 99% confidence interval for the change in emissions following the installation of the MAGENTIZER system (before - after)? Show two decimal places in your answer

**Related Questions**

math statitics - The makers of the MAGNETIZER Engine Energizer System (EES) ...

statistics - The makers of the MAGNETIZER Engine Energizer System (EES) claim ...

Statistics help please!!! - The makers of the MAGNETIZER Engine Energizer System...

Managerial Economics - Please help with this question: A researched estimated ...

Science**updated asnwers** - 5.B 6.A 7.C 8.D 9.A 11.D 13.D 5. Which of the ...

MTH233/statistics UOP - A car company says that the mean gas mileage for its ...

3 science questions - 7. Which of the following is used to make biomass fuel? B...

science - How does using coal to generate electricity A. using more coal ...

statistics - I want to examine the relationship between gas mileage of cars and ...

statistics - I want to examine the relationship between gas mileage of cars and ...