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anonymous

  • one year ago

Need Help!! Please!! Medal!!

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  1. anonymous
    • one year ago
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    The Graduate Record Examinations are widely used to help predict the performance of applicants to graduate schools. The range of possible scores on a GRE is 200 to 900. The psychology department at a university finds that the scores of its applicants on the quantitative GRE are approximately normal with mean = 544 and standard deviation = 103. Use your calculator or computer to find the relative frequency of applicants whose score X satisfies the following conditions: (As part of your answer, draw a standard normal curve and shade the area under the curve that represented the answer to the question; do this on scratch paper and provide a one-sentence description for the assignment). X < 500

  2. anonymous
    • one year ago
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    Please tag anyone you know that is good at math!!

  3. anonymous
    • one year ago
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    That is not the same question as mine. Can you just tag some people that are good at math please. @tiff9702

  4. anonymous
    • one year ago
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    @ganeshie8 @dan815 @Michele_Laino @iambatman @pooja195 @Hero

  5. Michele_Laino
    • one year ago
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    here is the situation described by your exercise: |dw:1441305133103:dw|

  6. anonymous
    • one year ago
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    Okay. So how would I properly describe it though? @Michele_Laino

  7. Michele_Laino
    • one year ago
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    now we have to compute the subsequent quantity: \[\Large t = \frac{{544 - 500}}{{103}} = ...?\]

  8. Michele_Laino
    • one year ago
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    yes! I think that you have to describe the steps in order to get my drawing above

  9. anonymous
    • one year ago
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    So the 1st step is to compute the subsequent quantity?

  10. anonymous
    • one year ago
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    I got 0.427

  11. Michele_Laino
    • one year ago
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    ok! we can round off that result to 0.43

  12. Michele_Laino
    • one year ago
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    now we have to use the table of the "erf" function, and we get that the relative frequency is: \[\Large r = 50 - 16.28 = ...\% \]

  13. anonymous
    • one year ago
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    So would I write that the 1st step is to compute the subsequent quantity?

  14. anonymous
    • one year ago
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    Okay I got 33.72.

  15. Michele_Laino
    • one year ago
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    yes! the first step is to compute the distance 0f 500 from the mean 544 in units of the standard deviation and yes! that percentage is the requested relative frequency

  16. anonymous
    • one year ago
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    Okay I got it so far :D

  17. Michele_Laino
    • one year ago
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    :)

  18. anonymous
    • one year ago
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    Is that all to get the graph? @Michele_Laino

  19. anonymous
    • one year ago
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    Wow! You make everything seem so easy! Thank you so much!!! @Michele_Laino

  20. Michele_Laino
    • one year ago
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    yes! my graph is all what we can do :)

  21. Michele_Laino
    • one year ago
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    :)

  22. anonymous
    • one year ago
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    Thank You!

  23. Michele_Laino
    • one year ago
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    thanks! :) :)

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