Taste Test Proj Example

# Taste Test Proj Example - _Taste Test Example Project p. 1...

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____________________________________________________Taste Test Example Project p. 2008 Susan Mathews Hardy shardy@kennesaw.edu 1 To: Ms. Hardy From: Susie Example—9:30 a.m. Class Elementary Statistics Date: March 18, 2008 Re: Root Beer Taste Test are included in this email. The detailed analysis is in the appendix accompanying this document. The summary of the conclusions follows. student opinions. Although the hypothesis test showed a preference for Big K, the P-value of .0955806607 was so close to the significance level of .10, that the significance of my sample result was marginal at best. This conclusion was confirmed by the fact that the 90% confidence interval tells us that the true proportion of students who preferred Big K is between 51% and 77%. Since this interval almost includes the “no preference” proportion of 50%, I would suggest that you not buy stock in either company. If you would like to pursue the viability of this investment further, I would suggest that we increase the sample size and redo the test to enable us to have a more accurate estimate of the true preference for Big K. By increasing the sample size from the existing 36 people to 576 people, we would reduce the margin of error from the current 13% to approximately 3%. Again, my detailed analysis follows. If you have any further questions, please contact me.

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____________________________________________________Taste Test Example Project p. 2008 Susan Mathews Hardy shardy@kennesaw.edu 2 Appendix Experimental Design I used the Completely Random Design for my experiment. I took 36 KSU students and randomly were 18 people in each treatment group. (See Random Assignment to Treatments section below.) Both root beers were in three-ounce cups that looked alike, with the exception that each cup had the number one or two on it. Before the participants picked up their cups, I instructed them not to express facially or vocally their preference for the root beers, and not to talk to each other. I did not let the participants know which brands were being tested. After each person tried both root beers, they handed me the cup of the one they preferred best. I
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## Taste Test Proj Example - _Taste Test Example Project p. 1...

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