The lower and upper quartile of standard normal variation are respectively ?
Correct answer: B. -0.6745 and 0.6745
- A. µ+0.6745σ and µ-0.6745σ
- B. -0.6745 and 0.6745
- C. -0.7979 and 0.7979
- D. -0.7979σ and 0.7979σ
Explanation
The standard normal first and third quartiles have z-values −0.6745 and 0.6745, respectively. Since the distribution is standardised, these values are not multiplied by σ.
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