PSYCH 2220H Chapter Notes - Chapter 6: Central Limit Theorem, Standard Deviation, Unimodality
19 Aug 2016
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Chapter 6: the normal curve, standardization and z scores: the normal curve, specific bell-shaped curve that is unimodal, symmetric and defined mathematically. Standardization, z scores and the normal curve: when data is normally distributed, can compare scores to entire distribution f scores, the need for standardization. Number of standard deviations a particular score is from the mean. Way to convert individual scores from different normal distributions to shared normal distribution with known mean, standard deviation and percentiles: transforming raw scores into z scores. Determine distance of a particular score (x) from population mean ( ) as part of the calculation (x- ) Express distance in terms of standard deviations by dividing by population standard deviation ( ) C. 2: transforming z scores into raw scores. Transform raw scores into standardized scores called z scores. Transform z scores into percentiles that are more easily understood: transforming z scores into percentiles.
