Math

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Suppose scores on an IQ test are normally distributed. If the test has a mean of 100 and a standard deviation of 10, what is the probability that a person who takes the test will score between 90 and 110?

  • Math -

    Check this answer that was posted yesterday.

    http://www.jiskha.com/display.cgi?id=1254361096

  • WOW Math -

    Ms.Sue, you are amazing.

  • Math -

    You're the amazing one, Reiny. You posted the answer with the link yesterday. :-)

  • Math -

    Yes, but you found it so quickly.
    I was still looking for it.

  • Math -

    Ahh -- I'll let you in on a little secret. <g> I entered IQ test in the little Search box in the upper right corner of the Jiskha screen. Boom! Your post popped right up.

  • Math -

    Thanks for the site. Is this the right formula:
    P(-1 < z < 1) = 0.683

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