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PSYCH 540 Week 5 DQ 2

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PSYCH 540 Week 5 DQ 2 -

1. The subject of this question is measures of central tendency. (Let’s not bother with mode because it will rarely come up in real life.) This is THE basic part of any quantitative study’s data analysis. Let’s make sure we’re clear about what the mean and what the median are. Does all data have a mean and a median? Why or why not? When is the mean the best measure of central tendency? When is the median the best measure of central tendency? Now for an important part of many studies: what is the standard deviation? (Don’t be shy about giving this a try; we’ll help with explanations.) Why is sd (standard deviation) such an important term?            

2. Now for correlations. The concept behind the word correlations is good to know well because it is the foundation of most studies: we see correlations between things and we wonder how these correlations work a lot as professionals.  What are the different types of correlation? Now for the technical area: How is the strength of a correlation determined?