The standard normal distribution has a mean equal to
A1
B0 ✓ Correct
C2
D1/2
Correct answer: (B) 0
Explanation
The standard normal distribution has a mean of zero.
It also has a standard deviation and variance of one.
Any normal variable becomes standard through the z-transformation.
The z-score expresses a value as deviations from the mean in standard units.
Its curve is symmetric and bell-shaped around zero.
Standardising lets different normal distributions be compared on one scale.
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