PSY 2106 Study Guide - Midterm Guide: Free Recall, Caffeine, Standard Deviation
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You want to know if caffeine improves performance on a free recall task composed of 100 words. From a normal population, you have randomly selected 64 participants that received 10 mg of caffeine 30 min. priors of testing. You want to know if your treatment is significant at the 0. 05 level. It is known that population mean is 18. 8 with a standard deviation of 5. 0. 2- (8 pts)you are in charge to evaluate the efficacy of a dancing class. For each participant, you recorded during an hour the number of time he (she) stepped on the feet of his (her) partner. In addition, you asked each participant how many weeks of practice they have completed. Nb. of times that a dancer stepped on partner"s feet. Measure the strength of the relationship between the two variables: (7 pts) a company publicized that its light bulbs have a life span of 5000 hours with a standard deviation of 600 hours.
