GGR270H1 Lecture : ggr270 lecture oct 5
Document Summary
Normal distribution - z scores standard scores are referred to as z scores indicate how many standard deviations separate a particular value form the mean. Z scores can be positive or negative depending if they are > or < the mean. Standard deviation result is interpreted as the "number of standard deviations on observation lays above or below the mean" Skewness measures the degree of symmetry in a frequency distribution determines how evenly the values are distributed either side of the mean. Correlation allows us to observe statistically the relationship between 2 variables looking at the strength and direction of the relationship between 2 variables most common graphing technique is the scatter plot. Correlation coefficients more rigorous approach to observing and measuring strength and direction of a bivariate relationship most constructed have a maximum value of 1. 0 and can be positive or negative. 1 = perfect negative relationship most common measure is pearson"s product moment correlation or.
