Allied & ICAR Exam Bank • ALLIED_2745 MCQ • 1 Mark

Section 1: Engineering Mathematics

Probability and Statistics

Subtopic: Poisson, normal and binomial distributions

Question Statement:

The total area under the standard normal curve $N(0, 1)$ between $z = -\infty$ and $z = +\infty$ is:

Options:

  • (A) $1$
  • (B) $\sqrt{2\pi}$
  • (C) $0.5$
  • (D) $2$

Answer Key:

A

Step-by-Step Solution & Explanation

The integral of any valid probability density function across its entire support equals 1.
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