Things to Remember:
* Two ways to figure out an average (mean) in Excel: =(B1+B2+B3)/3 or =average(B1:B3)
* A population consists of all members of some specified group. A parameter is a measure of a characteristic of an entire population.
* A sample is a subset of a population. It has the same characteristics as the population. A statistic is a measure of a characteristic of a sample.
* Scales of Measurement: Nominal (ex. social security#), Ordinal (in order - rank), Interval (IQ Scores), Ratio (ex. height and weight)
* Measures of Central Tendency: Mean, Median, Mode
* Measure of Variability: Range, Standard Deviation
* Negatively Skewed: tail points to the left, median is to the right of the mean, there are more higher scores
* Positively Skewed: tail points to the right, median is to the left of the mean, there are more lower scores
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1 comment:
Cheryl,
How comforting to hear someone describe statistics as comforting!
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