Mr. Z gave a test in Physics. Scores for the class are as follows: 76, 55, 73, 93, 29, 74, 57, 34, 54, and 75 out of a possible 100 points. Assume scores from this test are normally distributed.


Which three scores are the “most unusual”? Use z-scores to support your answer. Show all the values you calculated to support your answer. Round any z-scores in your answer to two decimal places.


Thanks for your Help.

Guest Apr 28, 2018

I do not understand the method you want me to solve the problem with. 


This is mine:


We can first find the median of this list of data, then find the numbers that are most of.


First, we can arrange it from least to greatest:


\(29, 34 , 54, 55, 57, 73, 74, 76, 93\)


The median, or middle number is 57.


The numbers farthest away from 57 are:


\( |57 - 29| = 28 \)






Therefore, the scores that are most unusual are:


29, 93, and 34.


I hope this helped,


GYanggg  Apr 28, 2018

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