Descriptive Stats Tutor Help
Summarize data with measures of center and spread, pick the right graph, and describe distributions with SOCS.
1 Concept recap
The essentials of Descriptive Statistics, on one screen.
1 Concept recap
Center
Mean = sum/n (pulled by skew). Median = middle of sorted data (resistant). Mode = most frequent.
Spread
Range = max − min. IQR = Q3 − Q1 (middle 50%). SD = root-mean-square distance from the mean.
Shape & graphs
Mean chases the tail: mean > median → right skew. Categorical → bar chart; quantitative → histogram; comparing groups → boxplots.
SOCS
Shape, Outliers, Center, Spread — always in context. Skewed → median/IQR; symmetric → mean/SD.
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