Assignment Null & Research Hypotheses and Type I & Type II Errors (3)

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Nakisha Cole June 27, 2017 Assignment : Null and Research Hypotheses, Type I and Type II Errors You must submit the questions with the answers. Use different color or different fonts (italics or bold) for the questions and the answers. Read the following scenarios I. A researcher compared the number of cavities of children who had used either Toothpaste brand M or Toothpaste brand L for a year. At the end of the year, the researcher found that the children who had used brand L had significantly fewer cavities than the children who had used brand M. The difference was significant at the .01 level. Answer the following questions for each one of the above research scenarios 1. What is the null hypothesis? Children that used toothpaste brand M and brand L after a year have the same amount of cavities. 2. What is the research hypothesis? Children that used the toothpaste brand L after a year had less cavities than the children that used toothpaste brand M. 3. What would be the Type I error? Toothpaste brand M is better than brand L to protect against cavities. 4. What would be the Type II error? Toothpaste brand L is not more effective than brand M to protect against cavities. 5. What is the probability of a Type I error? The chances are 5 out of 100 (0.05).

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Assignment Null & Research Hypotheses and Type I & Type II Errors (3)

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