ITPEC FE Morning April 2022 Question 3
ITPEC FE Morning April 2022 — Question 3 of 80
Normal Distribution — identify the correct definition of a normal distribution.
A normal distribution is a continuous, bell-shaped distribution that is symmetric about its mean.
Why not others:
- (a) A bathtub-shaped curve describes a failure rate curve (bathtub curve), not a normal distribution
- (c) A discrete distribution for event counts in a fixed interval describes the Poisson distribution
- (d) A discrete distribution with equal probabilities describes a uniform distribution
Key rule: Normal = continuous + bell-shaped + symmetric around the mean. The three classic discrete distributions to distinguish: Poisson (event counts), Binomial (success/fail trials), Uniform (equal probability).
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