Nicholas F.

asked • 03/22/23

On a recent quiz, the class mean was 74 with a standard deviation of 4.4.

On a recent quiz, the class mean was 74 with a standard deviation of 4.4. Calculate the z-score (to 2 decimal places) for a person who received score of 63.


z-score: 


Is this unusual? 

  1. Unusual
  2. Not Unusual


Carlos G.

tutor
Based on this data, the calculated z-score is -2.5 which places this person in a very low percentile which is .0062 This is unusual since this score is an outlier.
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04/20/23

1 Expert Answer

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Christal-Joy T. answered • 06/29/23

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PhD in Educational Psychology w/ 4 years teaching experience in Stats
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Here is a step by step solution to the problem! I hope you find this to be helpful. If there are any additional questions, please feel to reach out! Good luck! :)

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