Chapter_2_Mean_SD_Correlation_moodle

Chapter_2_Mean_SD_Correlation_moodle - Click to edit Master...

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Unformatted text preview: Click to edit Master subtitle style Short refresher of statistical The Mean Arithmetic average of scores in a distribution The scores need to be at least at least interval­scale The mean is the central point in a data­set with a normal distribution Standard deviation Square root of the variance Variance is the mean of the squared deviations about the n Between the Mean–SD mean and Mean+SD lays about 68.2% of the distribution n Between the Mean– 2xSD and Mean+2xSD lays about 95.4% of The Median The median is the point on a scale of measurement below which 50% of the scores fall (also called the 50th percentile). To find the median: › Rank order the measures from low to high › Count the number of measures and add one. › Divide by 2 => the measure at the (N+1)/2­place is the median. › When N is even. The median it is the value halfway the two measures in the middle of the series. (N+1)/2 Correlation What are the approximate R2 values for these plots? ...
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This note was uploaded on 02/03/2011 for the course KIN 3513 taught by Professor Porter during the Fall '08 term at LSU.

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Chapter_2_Mean_SD_Correlation_moodle - Click to edit Master...

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