Question

The scores on the Wechsler Adult Intelligence Scale are approximately Normal with μ = 100 and σ = 15. The 6^th decile of WISC score distribution is closest to

Group of answer choices

123.

114.

104.

109.

121.

Answer 1

Here in this Question it is given that The scores on the Wechsler Adult Intelligence Scale are approximately Normal with μ = 100 and σ = 15. The 6^th decile of WISC score distribution is exactly equal to 60th percentile.

So here the 6th decile is 60th percentile. The deciles means it is 9 perticular value that divides the whole data or distribution in 10 parts. So 6th decile is same as 60tg percentile.

The 60th percentile is calculated using following steps,

So the 6th decile is 103.8 which is 104 (Rounded).

So option C is correct.

C) 104.

Other options are incorrect.

Thank you.