Skewness - Positive & Negative Skew

In this video I explain one way in which a distribution can deviate from normality, which is skewness. I explain the difference between positive and negative skew, and how these can be seen in histograms, stem and leaf displays, and box and whisker plots. I then discuss the effect of skew on measures of central tendency and consider possible reasons a sample may be skewed and when we can expect a population to be skewed.

For detail on distributions which violate the general mean-median pattern see von Hippel (2005): https://www.tandfonline.com/doi/full/10.1080/10691898.2005.11910556

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#statistics_for_psychology #skew #skewness #positive_vs_negative_skew #what_causes_skew #mnemonic_for_positive_vs_negative_skew #psych_exam_review_skew #psych_exam_review_positive_vs_negative_skew #introductory_statistics #skew_explained #skew_mean_median #skew_box_&_whisker #skew_feet_mnemonic #skew_boxplot #how_to_remember_skew #normal_vs_skew #what_is_skew #skew_histogram #skew_population #skew_sample #skew_influence_on_mean #skewed_distribution #cause_of_skew #statistics

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