PSYC 2030 Lecture Notes - Lecture 6: Pearson Product-Moment Correlation Coefficient, Scatter Plot, Variance
20 Feb 2018
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Document Summary
There is always some harm - taking time. Benefit - lots more info out of one person, capture more complexity of that person. Weakness - generalizability - which population does that person represent. Scientific fraud - clear intent to deceive others. Questionable research practices - por ways, inflate type 1 error. Random samples in a self serving way - to stop collecting data that look good to you, reporting only what works in favour for you. Scores, different from one another - so they vary. Positive - as scores on one get larger, scores on the other get larger. Negative = as scores on one get larger, scores on the other get smaller. Both, an effect size- how big an effect/strongly 2 things are associated, and also a descriptive statistic- describes relationship between variable sin your sample. Perfect positive correlation - same scores both ways. Graph is a perfect 45 degree line going up.
