W5 Lecture Part I - Week Five Lecture We are near the end...

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Week Five Lecture We are near the end of the 10 week research and evaluation journey. We will close this adventure with a description of one more statistics tool, Linear Regression and Correlation. We will define then describe these terms and how they are used in applications. Let’s first review what we have covered the past nine weeks in research and evaluation. We initially learned about descriptive statistics where we organized raw data into frequency distributions, examined several measures of central tendency and measures of dispersion to describe the major characteristics of the data. We then turned to inferential statistics in which we inferred something about a population parameter, such as the population mean based on a sample. We tested (oh how we tested) for the reasonableness of a population mean, and knew that we could also do that for the difference between two population means or whether the population means were equal. When we did these tests (z and t) we involved one variable that was either interval or ratio. In chi-square, we tested the variable that was nominal.
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W5 Lecture Part I - Week Five Lecture We are near the end...

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