The Wechsler Adult Intelligence Scale scores are calibrated to vary according to

Question

The Wechsler Adult Intelligence Scale scores are calibrated to vary according to a normal distribution with a mean of 100 and standard deviation of 15. What Wechsler scores cover the middle 50% of the population? In other words, identify the 25th percentile and 75th percentile of the population? The Wechsler Adult Intelligence Scale scores are calibrated to vary according to a normal distribution with a mean of 100 and standard deviation of 15. What Wechsler scores cover the middle 50% of the population? In other words, identify the 25th percentile and 75th percentile of the population? The Wechsler Adult Intelligence Scale scores are calibrated to vary according to a normal distribution with a mean of 100 and standard deviation of 15. What Wechsler scores cover the middle 50% of the population? In other words, identify the 25th percentile and 75th percentile of the population?

Explanation / Answer

so, 25 th percentile = [ 100 - ( 0.6744898* 15) ]......z-score for 25% = 0.6744898
= 89.88265
and 75% percentile = [ 100 + (  0.6744898* 15) ] = 110.1173...
scores between [ 89.88265 , 110.1173 ] covers the middle 50% of the population......

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.