You plan to apply significance testing to your own experiment for testing astrology, in which astrologers have to guess which of four personality profiles is the correct one for someone who has a particular horoscope. Define notation and state hypotheses, letting one hypothesis reflect the possibility that the astrologers’ predictions could be better than random guessing.
Answer to relevant QuestionsAn article in a marketing journal states that “no statistically significant difference was found between men and women in the proportion who said they would consider buying a hybrid car (P-value = 0.63).” In practical ...It is more informative and potentially less misleading if you conclude a test by reporting and interpreting the P-value rather than by merely indicating whether or not you reject H0 at the 0.05 significance level. One reason ...Refer to the previous exercise. Suppose z = 2.50 instead of 1.04. a. Find the P-value for (i) Ha: p > 0.50. (ii) Ha: p ≠ 0.50, and (iii) Ha: p < 0.50. b. Do any of the P-values in part a provide strong evidence against H0? ...Studies that compare treatments for chronic medical conditions such as headaches can use the same subjects for each treatment. This type of study is commonly referred to as a crossover design. With a crossover design, each ...In a recent study, 10 272 moderately obese subjects were randomly assigned to one of three diets: low-fat, restricted-calorie; Mediterranean, restricted calorie; or low-carbohydrate, non-restricted- calorie. The prediction ...
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