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Ch. 3 ➔ Appropriate measures depend on the shape ◆ Symmetric: mean and standard deviation ◆ Skewed: median and interquartile range ➔ The mean: The average ◆ Literally the balancing point ◆ For a symmetric distribution, the mean is at the center and close to typical values ◆ Also balances skewed graphs ● Doesn’t tell us the typical value ● Right skewed, the average is to the right of the typical values and vice versa ➔ Standard Deviation: number that measures how far away a typical observation is from the me