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MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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I have a statistics question. Question number 23 which circled on attached image.
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6C The Normal Distribution 393
standard score was 75. 21-28: Psychology Exam. The scores on a psychology exam were
normally distributed with a mean of 67 and a standard deviation of 8.
ve, and she gave a
ard score of 2 or more.
21. About what percentage of scores were above 59?
co he is of median height.
22. About what percentage of scores were below 83?
23, A failing grade on the exam was anything 2 or more standard
deviations below the mean. What was the cutoff for a failing
score? Approximately what percentage of the students failed?
ing sets of three distri-
scale. Identify the two
ormal distributions, which
24. If 500 students took the exam, approximately how many stu-
dents scored below 75?
91008 bsbr esd
25. What is the standard score for an exam score of 67?
26. What is the standard score for an exam score of 63?
27. What is the standard score for an exam score of 55?
28. What is the standard score for an exam score of 85?
IM8
29-30: Standard Scores and Percentiles. Use Table 6.3 to find the"
Transcribed Image Text:phoW ot aoitel
6C The Normal Distribution 393
standard score was 75. 21-28: Psychology Exam. The scores on a psychology exam were
normally distributed with a mean of 67 and a standard deviation of 8.
ve, and she gave a
ard score of 2 or more.
21. About what percentage of scores were above 59?
co he is of median height.
22. About what percentage of scores were below 83?
23, A failing grade on the exam was anything 2 or more standard
deviations below the mean. What was the cutoff for a failing
score? Approximately what percentage of the students failed?
ing sets of three distri-
scale. Identify the two
ormal distributions, which
24. If 500 students took the exam, approximately how many stu-
dents scored below 75?
91008 bsbr esd
25. What is the standard score for an exam score of 67?
26. What is the standard score for an exam score of 63?
27. What is the standard score for an exam score of 55?
28. What is the standard score for an exam score of 85?
IM8
29-30: Standard Scores and Percentiles. Use Table 6.3 to find the
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