5. Suppose there are 10,000 test takers of the IQ test where the mean is 100 and the standard deviation of 15. What is the raw score that correspond to each of the following z scores: a. Z = 1 b. Z= -2 c. Z = 1.31

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5. Suppose there are 10,000 test takers of the IQ test where the mean is 100 and the
standard deviation of 15.
What is the raw score that correspond to each of the following z scores:
a. Z = 1
b. Z = -2
c. Z = 1.31
6. You got 91 in this statistics subject. How well did you do relative to all of the students
who took it? What would be the percentile rank of your grade? The mean has been
computed to be 86.87 and standard deviation of 3.25.
7. Find the proportion area of the region between z = 1.11 and z = -3.15
8. Using the z-table find the value of the following z-scores
a. Z = 1.58
b. Z= -3.23
c. Z= 3.65
Transcribed Image Text:5. Suppose there are 10,000 test takers of the IQ test where the mean is 100 and the standard deviation of 15. What is the raw score that correspond to each of the following z scores: a. Z = 1 b. Z = -2 c. Z = 1.31 6. You got 91 in this statistics subject. How well did you do relative to all of the students who took it? What would be the percentile rank of your grade? The mean has been computed to be 86.87 and standard deviation of 3.25. 7. Find the proportion area of the region between z = 1.11 and z = -3.15 8. Using the z-table find the value of the following z-scores a. Z = 1.58 b. Z= -3.23 c. Z= 3.65
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