Which psychological perspective is most likely to focus on how our interpretation of a situation affects how we react to it? a. Psychodynamic b. Biological c. Social-cultural d. Evolutionary e. Cognitive
Inferences Involving Averages T-statistic (estimated z-score) ● Use sample variance to estimate population variance ○ SD and u of population unknown ○ Required: sample & hypothesis of population mean ○ Use degrees of freedom ● Used when ○ Can treatment work (known pop mean) ○ Compare sample with hypothesized ● Estimated standard error of the mean (denominator of t-test statistic) = s/(n^0.5) Sampling error: between sample and population mean Goal of hypothesis test: evaluate significance of discrepancy T distribution ● Bell-shaped and symmetrical ● Mean of 0 ● More variability than normal distribution (flatter) ● The larger the df, the closer to normal ● Degree of freedom = n - 1 ○ How wel
