PSYA01H3 Lecture Notes - Lecture 6: Dependent And Independent Variables, Statistical Inference, Peon
Document Summary
Descriptive statistics -> condensed data drawn from many numbers. Some data points are not worth taking up much space for. 3 ways of measuring central tendency (typical, average person that is in your study) Mean -> the point that is the minimum possible distance from all the other points in the sample. Median -> the point that half the data points lie above and half lie below. Mode -> the most frequently occurring data point or observation. Medium isn"t really sensitive to the extremes because it literally sits in the middle. Anytime you take any set of numbers and compute the average deviation of those numbers from the mean the sum is always zero. Absolute deviation and squaring to get rid of negative numbers. M. a. d score -> mean absolute deviation of each data point from the mean of the numbers (pretending negatives are positive) Variance -> the average squared deviation of each data point from the mean.
