Can someone please help? Thank you. The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On onesubtest, the raw scores have a mean of 35 and a standard deviation of 6. Assuming theseraw scores form a normal distribution:a) What proportion of raw scores are between 28 and 38?b) What proportion of raw scores are between 41 and 44?c) What number represents the 65th percentile (what number separates the lower65% of the distribution)?d) What number represents the 90th percentile?

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Answered: The Welcher Adult Intelligence Test…

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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Can someone please help? Thank you.

The Welcher Adult Intelligence Test Scale is composed of a number of subtests. On one
subtest, the raw scores have a mean of 35 and a standard deviation of 6. Assuming these
raw scores form a normal distribution:
a) What proportion of raw scores are between 28 and 38?
b) What proportion of raw scores are between 41 and 44?
c) What number represents the 65th percentile (what number separates the lower
65% of the distribution)?
d) What number represents the 90th percentile?

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The welcher Adult intellegence test scale is composed of a number of subtests. On one subtest, the raw scores have a mean of 35 and a standard deviation of 6. Assuming these raw scores form a normal distribution: what proportion of raw scores are between 41 and 44?

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