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anonymous

  • one year ago

The scores received by students completing a geology exam are normally distributed. If the average score is 122 and the standard deviation is 35, what percentage of students scored between 52 and 122?

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  1. anonymous
    • one year ago
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    well you would have to find out the other scores

  2. anonymous
    • one year ago
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    what you see there is all that is given

  3. anonymous
    • one year ago
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    these are the choices A: 34.0% B: 37.5% C: 42.0% D: 47.5% E: 48.0%

  4. Vocaloid
    • one year ago
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    convert 52 and 122 to their respective z-scores using the formula z-score = (given number-mean)/standard deviation

  5. Vocaloid
    • one year ago
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    then, use a graphing calculator function normalcdf(z-score1,z-score2) or use a z-table to find the corresponding percentages

  6. anonymous
    • one year ago
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    I would prbab;y go d just sayin

  7. anonymous
    • one year ago
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    Okay, thanks @Vocaloid

  8. anonymous
    • one year ago
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    are u using computer because if so it has a graphing calc on it

  9. Vocaloid
    • one year ago
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    @ray-mccloud: if you need to check your answer, you can use this online calculator https://www.easycalculation.com/statistics/normal-distribution.php

  10. anonymous
    • one year ago
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    or that but it would be quicker to do the that is automatically on yo computer

  11. anonymous
    • one year ago
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    hey ray I think I figured my problem out but can u check jus to be sure

  12. anonymous
    • one year ago
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    alright zach but give me a sec while I finish up my problem.

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