PSYA01H3 Lecture Notes - Lecture 5: Dependent And Independent Variables, Descriptive Statistics, Standard Deviation
Document Summary
Psya01 - lecture 5- finding answers begin (cid:271)y finding questions (cid:894)(cid:272)ontinued (cid:895) Mean - the point that is the minimum possible distance from all the other points in the sample ( won"t work if we have extremes). Median - the point that have the data points lie above, and half lie below (method used if mean is not appropriate for data) Mode - the most frequently occurring data point (or observation) How spread out the data is? (variability) Average of how far they are from the mean. The sum of the average distances is zero. Mad - the mean absolute deviation of each data point from the mean of the # 1. 2 vs. 9. 2 ( make all values positive and final average) ( more sensitive to typical statistical problems) Variance - the average squared deviation of each data point from the (cid:373)ea(cid:374) 2 vs. Standard deviation - sqrt (variable) = sqrt (115. 6) = 10. 75.
