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Statistics. I Need Help Please

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George scored a 62 on his AP World History test and had a z-score of -3.75. Julie is also in the class with George and scored an 83 on the same test, with a z-score of 1.5. From this information, FIND THE CLASS mean and standard deviation.

  • Statistics. I Need Help Please -

    (62-mean)/st.dev.=-3.75
    (83-mean)/st.dev.=1.5

    Solve this system.

  • Statistics. I Need Help Please -

    thanks. my teacher gave me the answer, but i don't know how to get to it. So is this the way to get to the answer

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