PSCH 343 Lecture 3: PSCH 343 Week Three Notes
1 Feb 2016
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We conduct studies on samples, but we draw conclusions about populations. Can we claim that the differences or relationships we found in our study represent differences or. Inferential statistics allow us to draw conclusions that go beyond data from a study. A survey of 100 jurors shows more men than women voted guilty. All people who go through cbt for anxiety versus 50 people in a clinical trial. We assume characteristics (data) are normally distributed in a population. Normal curve: bell-shaped frequency distribution, symmetrical, unimodal, specific mathematical properties, commonly found in nature. The properties of normal distribution allow us to create standardized scores based on the. These standardized scores are very informative and allow us to compare performance on. 34% of scores between mean and 1 sd. 14% of scores between 1 sd and 2 sds. 2% of scores beyond 2 sds raw scores, means, and sds different measures with different scales.
