The most common alpha level is 0.05. When is a higher alpha level (e.g. 0.10) typically used?
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The most common alpha level is 0.05. When is a higher alpha level (e.g. 0.10) typically used?
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- A dentist wanted to determine if a relationship existed between childhood fluoride exposure and cavities. She took a sample of adults in her practice and counted how many cavities each person had in his or her permanent teeth. She also determined how many years of childhood each person was exposed to tap water with fluoride. The minimum value on this variable was 0 and the maximum was 18. Using the data below, an alpha of .05 and a two-tailed test, was there a significant relationship? Years of fluoride Number of cavities 0 10 18 1 2 7 12 3 3 4 10 5 M = 7.5s =6.98 M = 5.00s = 3.16For any given alpha level, x2crit _________.A researcher is looking at a new marketing campaign for a product. After 200 people watched the marketing campaign about 60 percent liked the product. Prior to the marketing campaign the product was liked by about 50 percent of people. What is the chi-square cutoff for an alpha of 0.05 for this research project?
- What is the effect of decreasing the alpha level (for example, from α = .05 to α = .01)? A. This action increases the likelihood of rejecting H0 and increases the risk of a Type II error. B. This action decreases the likelihood of rejecting H0 and increases the risk of a Type I error. C. This action decreases the likelihood of failing to reject H0 and decreases the risk of a Type I error. D. This action increases the likelihood of failing to reject H0 and increases the risk of a Type II error.If you have run 9 tests and are using the Bonferroni correction to correct for multiple comparisons, what should your new alpha level be if alpha was originally set at .05? Report your answer rounded to 3 decimal places.I am trying to find the breakdown of the alpha, sensitivity, and specificity .. I hope this makes sense.