Normal distribution: A bell curve or a Gaussian distribution curve. If a random variable has a probability distribution whose graph is continuous, symmetric, and bell-shaped.
Approximately normally distributed variables: Many continuous variables (e.g. weights, heights) have distributions that are bell-shaped
Standard normal distribution: a normal distribution with a mean of µ = 0 and a standard deviation of σ = 1.
Z-score formula: X − 𝝁 / σ
Mean = Median = Mode
A normal distribution curve is unimodal.
The curve never touches the x-axis.
The total area under a normal distribution curve is equal to 1.00
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