click below
click below
Normal Size Small Size show me how
psych stats
appendix a stats
Question | Answer |
---|---|
percentile rank | the percentage of scores in a distribution that fall below a given score |
mode | the most frequently occuring score in the distribution |
mean | arithmetic average |
median | the middle score |
range | the diference between the highest and lowest scores in a distribution |
standard deviation | the measure of score variability; computed by calculating the deviation of each score from the mean, squared it, finding the average and the square root of that |
normal curve | bell shaped distribution |
regression toward the mean | the tendency for extremes of unusuall scores to fall back toward the average |
statistical significnance | a statistictical statement abotu how liekly it is that a result occured by chance |