Correlation, Relationship measure between variables, Co-variable, One of two related variables, Positive correlation, Both variables increase together, Negative correlation, One increases, other decreases, Zero correlation, No relationship between variables, Qualitative data, Describes qualities, non-numerical, Quantitative data, Numerical, measurable data, Primary data, Collected firsthand by researcher, Secondary data, Previously collected, reused data, Meta-analysis, Combines results of multiple studies, Median, Middle value ordered, Mode, Most frequent value, Range, Difference between highest and lowest, Standard deviation, Variance from the mean, Scattergram, Dots showing relationships, Bar chart, Bars for categorical discrete data, Histogram, Graph showing frequency within intervals, Normal distribution, A distribution that is symmetrical and bell-shaped, Skewed distribution, A distribution that is not symmetrical, Mean, The average value., Positive skew, Tail is longer on the right; most values are low., Negative Skew , Tail is longer on the left; most values are high..

Statistics and Data Analysis

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