Standard Normal Distribution
Standard normal distribution is a normal distribution with mean equal to 0 and standard deviation of 1.
The general formula for the probability density function of the normal distribution is -
Where μ = mean and σ = standard deviation.
When μ = 0 and σ = 1, the probability density function becomes,
The normal random variable of a standard normal distribution is called standard score or z-score.
Properties of standard normal distribution:
1. The random variable z varies from -∞ to +∞.
2. The total area under the curve is equal to 1.
3. The curve is symmetric around 0.
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