5. Decide whether to reject the null hypothesis -Sketch the distributions involved

2) Dr. Drake Ramoray is interested in the effect of taking vitamins has on fitness in Central Perk workout center. The average score on a fitness test was 58 with a standard deviation of 10 for all those who workout there. After starting the vitamins, Dr. Drake Ramoray tested 50 participants and found their mean to be 52. Using the .01 level of significance, was this difference significant? a. Use the five steps of hypothesis testing! 1 Restate the question as a research hypothesis and a null hypothesis about the populations. Null Hypothesis: Research Hypothesis: 2 Determine the characteristics of the comparison distribution. Distribution of means: OM = OM = 2 9 UM = Shape = 3 Determine the cutoff sample score on the comparison distribution at which the null hypothesis should be rejected. One-Tailed Two-Tailed Significance .05 -1.64 or 1.64 -1.96 and 1.96 Level 01 -2.33 or 2.33 -2.58 and 2.58 Cut off ( level, tailed) = 4 Determine your sample's score on the comparison distribution. M - UM Z = OM