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Published byAshlie Ellis Modified over 9 years ago

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Frequency distributions and their graphs Frequency distribution tables give the number if instances of each value in a distribution. Frequency distribution graphs give a graphical depiction of the data in a frequency table. –Bar graphs –Histograms –Frequency polygons

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Frequency Table for Parent’s Level of Education

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Bar Graph of Parents’ Level of Education

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Frequency Table of Achievement

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Histogram of Achievement Scores

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Bar graph of Achievement Scores

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Shape of Distributions: Skew The skew of a (frequency) distribution tells us something about the shape of the distribution. Normal (bell-shaped) distributions are not skewed (have zero skew); symmetrical. Positive skew: tail in the direction of high scores. Negative skew: tail in the direction of low scores.

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