Stat 217 – Day 23QuizLab 6 – Sleep DeprivationVisual Discrimination TasksStickgold, James, Hobson (2000)Statistical SignificanceStat 217 – Day 23Lab 6QuizWhat do you know about the sample?Shape, center, spread from histogramWhat do you know about population?Not muchIf representative, assume looks like sample?95% confidence interval for population meanFail to reject 90 as a plausible value for What do you know about distribution of sample means?Central Limit Theorem (approx normal, , /sqrt(n))Lab 6 – Sleep Deprivation “Sleep is required for memory consolidation - the process by which experience or training is transformed into improvements in performance.”Visual Discrimination Tasksa b ca b ca b ca b cStickgold, James, Hobson (2000)Investigated whether you can make up for a missed night’s sleep60-90 minute training sessoinGroup A: Sleep deprived one night, unrestricted sleep 2 nightsGroup B: Unrestricted sleep all 3 nightsRetested after 72 hoursStatistical SignificanceBefore we mixed up the blue and green cards and counted the number of successes randomly assigned to group ANowAssume everyone would get same score regardless of which treatment they received (null hypothesis)Put numerical score on each cardMix them up and deal them out (to represent the random chance in random assignment)See how often we observed a difference in means at least as large as the actual
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