Paper 1 · Research Aptitude
UGC NET June 2023 (21.06.2023) Shift-I
The standard normal distribution has a mean equal to
A1
B0 ✓ Correct
C2
D1/2
Correct answer: (B) 0 — The standard normal distribution has a mean of 0, so the answer is 0.
Explanation
★The standard normal distribution has a mean of 0, so the answer is 0.
★The standard normal distribution is also called the z-distribution.
★It is a special normal distribution used as a reference.
★By definition its mean is set to 0.
★Its standard deviation is set to 1.
★So values are measured as distances from this zero mean in standard-deviation units.
★Therefore the mean of the standard normal distribution is 0.
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