Choose the correct cod for the following statements being correct or incorrect.

Statement I: If the value of \(\beta_2, i.e \frac{\mu_4}{\sigma_4}\), of a distribution gives the value more than 3, its curve is platykurtic.

Statement II:  In a moderately asymmetrical distribution, the standard deviation is 1.25 times of mean deviation.

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UGC Paper 2: Commerce 22nd Dec 2018
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  1. Both the statements I and II are correct
  2. Both the statements I and II are incorrect.
  3. Statement I is correct, but II is incorrect
  4. Statement II is correct, but I is incorrect

Answer (Detailed Solution Below)

Option 4 : Statement II is correct, but I is incorrect
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Statement I:  If the value of \(\beta_2, i.e \frac{\mu_4}{\sigma_4}\), of a distribution gives the value more than 3, its curve is platykurtic.

Explanation:

  1.  Leptokurtic Curve - Value of β2 is greater than 3.
  2.  Mesokurtic Curve - Value of β2 is equal to 3.
  3.  Platykurtic Curve - Value of β2  is less than 3.

Thus, Statement I is incorrect.

Statement II: In a moderately asymmetrical distribution, the standard deviation is 1.25 times of mean deviation.

Explanation:

In a moderately asymmetrical distribution (variable occurs at the irregular frequency), the standard deviation is 1.25 times of mean deviation.

This statement is correct.

Therefore, Statement II is correct, but I is incorrect.

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