You received a 74% on a quiz. You are curious about how you did in the class overall and want to know the percentile rank. You got the mean the standard deviation from the quiz. X=74.00 X Bar= 79.90 SD= 13.60 1) find the z-score, then identify your percentile rank in the class. you found out friend number 1 did better than you on this test getting a 77%. However, both of you are in the same communications class and you did better than friend number 1. You did better than them by scoring a 78% on the communication test your friend got a 72% on the communications test. The stats are X Bar= 73.90 SD=20.10 Figure out if you performed better than your friend averaging across both exams 2) calculate the z-score for your communication test performance 3) Next calculate the z-score that represents your friend's performance on the communications test 4)Now average the z-scores for each person to determine how each person performed on average on the test combined 5) Lastly compare the ultimate z-scores to determine who performed better. be sure to report how much better you performed.
You received a 74% on a quiz. You are curious about how you did in the class overall and want to know the percentile rank. You got the mean the standard deviation from the quiz.
X=74.00 X Bar= 79.90 SD= 13.60
1) find the z-score, then identify your percentile rank in the class.
you found out friend number 1 did better than you on this test getting a 77%. However, both of you are in the same communications class and you did better than friend number 1. You did better than them by scoring a 78% on the communication test your friend got a 72% on the communications test. The stats are
X Bar= 73.90 SD=20.10
Figure out if you performed better than your friend averaging across both exams
2) calculate the z-score for your communication test performance
3) Next calculate the z-score that represents your friend's performance on the communications test
4)Now average the z-scores for each person to determine how each person performed on average on the test combined
5) Lastly compare the ultimate z-scores to determine who performed better. be sure to report how much better you performed.
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