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Normal distribution & z-Scores

Learn how to determine if your data is normally distributed by calculating z-scores and interpreting the results. Discover the percentage of data falling above or below specific values.

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Normal distribution & z-Scores

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  1. Normal distribution & z-Scores Michelle Brooks Section 1 Math 11

  2. Is your data normally distributed? • No I don’t think my data is evenly distributed because most of my data is close • together and there isn’t a good variation in numbers, nor does it form a bell curve • when plotted on a graph.

  3. How many tables do you have in your house?

  4. Z-Scores • My z-score: 11-7.2/2.7= 1.41= .9207 on the z-score chart • I have more tables than: 92.07 % • I have less tables than: 7.93% • Largest: 3-7.2/2.7= -1.52= 0.0643 on the z-score chart = 6.43% • Smallest: 13-7.2/2.7= 2.15= 0.9842 on the z-score chart = 98.42%

  5. How long does it take you to walk to school?

  6. Z-Scores • My z-score: 35-18.9/13.8= 1.17= .8790 on the z-score chart • I take more time to walk to school than: 87.9% • I take less time to walk to school than: 12.1% • Largest: 55-18.9/13.8= 2.62= .9956 on the z-score chart = 99.56% • Smallest: 5-18.9/13.8= -1.01= .1562 on the z-score chart = 15.62%

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