Moderate

In a normal distribution quartile deviation is _______ (S.D.)?

Correct answer: D. .6745

  • A. .2745
  • B. .3789
  • C. .79079
  • D. .6745

Explanation

For a normal distribution, the first and third quartiles lie at z = −0.6745 and z = 0.6745. Thus the quartile deviation is 0.6745 standard deviations, making option d correct.

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