7. 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 number represents the 65" percentile (what number separates the lower 65% of the distribution)? b. What number represents the 90th c. What is the probability of getting a raw score between 28 and 38? d. What is the probability of getting a raw score between 41 and 44? percentile?

A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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Answer the number 7
a) A score that is 20 points above the mean.
b) A score that is 10 points below the mean.
c) A score that is 15 points above the mean
d) A score that is 30 points below the mean.
7. 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 number represents the 65" percentile (what number separates the lower 65% of the
distribution)?
b. What number represents the 90th percentile?
What is the probability of getting a raw score between 28 and 38?
d. What is the probability of getting a raw score between 41 and 44?
C.
II. Essay
1. Why is it often necessary to find the sum of a set of numbers?
Transcribed Image Text:a) A score that is 20 points above the mean. b) A score that is 10 points below the mean. c) A score that is 15 points above the mean d) A score that is 30 points below the mean. 7. 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 number represents the 65" percentile (what number separates the lower 65% of the distribution)? b. What number represents the 90th percentile? What is the probability of getting a raw score between 28 and 38? d. What is the probability of getting a raw score between 41 and 44? C. II. Essay 1. Why is it often necessary to find the sum of a set of numbers?
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