
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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- A toothpaste manufacturer claims that children brushing their teeth daily with his company’s product (brand A) will have fewer cavities than children using brand B. In a carefully supervised study, the number of cavities in a sample of 5 children using brand A toothpaste was compared with the number of cavities in a sample of 5 children using brand B toothpaste. Using the information below, assess whether there is a significant difference in the mean number of cavities across the two groups. Use an alpha level of .05.
- Obtained value:
- Critical/ cut-off value:
- Conclusion:
Brand A Brand B
Mean = 1.1 Mean = 4.3
SS = 12 SS = 10
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