February 5, 2008 Lecture Notes

February 5, 2008 Lecture Notes - February 5, 2008...

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February 5, 2008 Differential Statistics -  used to summarize, organize, and simplify data Ex: mean, median, standard deviation, range Inferential Statistics-  used to make generalizations from samples to population Population: set of all people of interest for a study Sample: set of people selected from the population Central Tendency-   - Find a single value that is most “representative” of the entire distribution of  scores - Mean, median, mode Learning the Variables-  practice on p 24-27, 30-32 - X, y variables or values - Σ = Sigma = summation - Σ X odes not equal  Σ X Σ Y - ( Σ X) 2  does not equal  Σ X 2 o Mean-   the arithmetic average = Sum of all scores / total number of scores (N) - M is the sample mean (x bar) - μ  = Population mean “mu” - Sample mean:  M =  Σ X/N - Population mean:  μ Σ
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February 5, 2008 Lecture Notes - February 5, 2008...

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