MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN: 9781119256830
Author: Amos Gilat
Publisher: John Wiley & Sons Inc
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  1. A researcher has collected data on self-esteem from a sample of participants. The sample mean is 30.00 with a standard deviation of 8.00. If Eric's raw score is 25 and Joe's score (expressed as a z score) is –0.50, who has scored lower on the self-esteem measure?
  2. A local community college reported that the average SAT score of its students is 960 with a standard deviation of 82. If a student scored 975 on the SAT, what is the student's z score? Did the student do better or worse on the SAT compared to the average student in the college?
Expert Solution
Check Mark
Step 1

as per guideline expert have to answer first question only. 

x¯ = 30s = 8

eric's score x = 25

joe's score in standard distribution Z = -0.50

whose score is lower?

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