Brite Smile Toothpaste
Tuesday, July 6th, 20102.In your experiment, what might be statistically measured?
Q: 3. What would be a null hypothesis that could be tested by data? Here is the website they want me to use, www.graphpad.com/quickcalcs/index.cfm
The Smile Brite Comp. promotes their toothpaste as the best cavity fighting, they chose 200 12yr olds at random half used Crest, N=100 for each sample.
1.What is the hypothesis that Smile Brite is promoting? My answer: It is promoting if its toothpaste is the better cavity fighting than Crest
A: 2. I would probably measure the mean number of cavities each group experienced.
3. The null hypothesis is always a statement of no difference. In this case, the null hypothesis is that Smile Brite is no more effective at preventing cavities than Crest.
1. Yay you!
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