Conduct the appropriate hypothesis test

Reference no: EM131436209

Fuel Consumption and Cars

Biodiesel fuel has a cloud point, the temperature at which the fuel becomes cloudy, of approximately 13°C. This clouding can lead to poor engine performance and can even cause an engine to stop completely. An industrial chemical company produces an additive designed to lower the cloud point of this type of fuel. A random sample of six different biodiesel fuels was obtained and the cloud point was measured for each. One ounce of the chemical additive was mixed in with every fuel sample and the cloud point was measured again. The resulting data are given in the following table (temperatures in °C).

Fuel	1	2	3	4	5	6
Before additive	11.7	12.9	14.2	12.7	11.3	12.4
After additive	10.3	10.7	14.1	10.0	11.2	12.1

a. Assume normality, and conduct the appropriate hypothesis test to determine whether the additive lowers the mean cloud point in biodiesel fuel. Use a = 0.05.

b. Conduct an inappropriate two-sample t test to compare the population mean cloud point before treatment with the population mean cloud point after treatment. Assume the population variances are unequal and use a = 0.05.

c. Compare the conclusions in parts (a) and (b). How are the test statistics the same, and how do they differ?

Reference no: EM131436209

Questions Cloud

Review the letters your classmates have posted : ECE 430- Review the letters your classmates have posted. Respond to two of them as if you are Mrs. Ford, the center director, who has just received Mrs. Ashland's letter with her request for planning curriculum instruction.

Rearranging chemical or nuclear bonds : Describe how you would relate energy derived from wave power all the way back to rearranging chemical or nuclear bonds into more stable states?

Calculate the acceleration of the sled : Using the coefficient of friction for steel on ice, calculate the acceleration of the sled if its mass plus the child's is 20 kg, assuming the sled is already in motion.

Why geh expanded its operations of developing new drugs : Markets in developed economies are approaching saturation level. Therefore, MNCs are searching for new untapped markets in emerging countries such as India and China. Since the healthcare industry will continue to grow in the future due to the siz..

Conduct the appropriate hypothesis test : Assume normality, and conduct the appropriate hypothesis test to determine whether the additive lowers the mean cloud point in biodiesel fuel. Use a = 0.05.

The main arguments christine is likely to encounter : Christine is a member of the management team of a company that, until recently, was extremely profitable; in fact, the management team has regularly received year-end bonuses. What are the main arguments Christine is likely to encounter? That is, wha..

Edge of the roof if the kinetic friction force : While a roofer is working on a roof that slants at 45.0 ° above the horizontal, he accidentally nudges his 95.0 N toolbox, causing it to start sliding downward, starting from rest.If it starts 4.60 m from the lower edge of the roof

Should hpv vaccination be added to the list of vaccinations : BHM415-Should HPV vaccination be added to the list of vaccinations deemed to be compulsory? Why or why not? (Note: Be sure to support your responses with evidence from your background readings.)

How the discovery of america changed the world : "The discovery of America, and that of the passage to the East Indies by the Cape of Good Hope, are the two greatest events recorded in the history of [human] kind"-Adam Smith, in The Wealth of Nations, 1776. Think about why he and many other nota..

User Account

All Pages