Day 1: Standard Deviation Puzzles #2

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  • TopazJ 9 years ago + 1 comment

    Considering this is just an introduction to statistics, and not really a "contest", it wouldn't hurt to attempt to explain what the "Z-Score" is for those of us who had to google it, instead.

    Z = (Score - mean) / Standard Deviation.

    Score in our case being 0.9025

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    • claguna 9 years ago + 0 comments

      I completely missed the fact that we had transform cm to meters. Thanks for the hint

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    • zeliboba 9 years ago + 2 comments

      Please write problem statement more formally, I couldn't understand it. What is "z"?

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      • PRASHANTB1984 Challenge Author 9 years ago + 2 comments

        As explained in the statement z = "the number of standard deviations away from the mean that the particular child is."

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        • vedsarkushwaha 9 years ago + 0 comments

          I think, adding 1 example will explain the problem statement better. :)

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          • luizacc 9 years ago + 0 comments

            I agree with @vedsarkushwaha This is supposed to "introduce" you to statistics...

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          • BMichaels 9 years ago + 0 comments

            Google the "z score".

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          • pantzzzz 9 years ago + 0 comments

            I feel like this one was a bit too simple.

            *SPOILERS, DO NOT READ IF YOU HAVEN'T SOLVED****

            All you have to do is subtract the known height from the mean, and divide by the std-dev. Unless that was the point of this challenge. In which case I will promptly stfu =P

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            • Vinprogress 9 years ago + 1 comment

              Answer is -9.00?

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              • cagdas Asked to answer 9 years ago + 0 comments

                It can't be negative

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              • Vinprogress 9 years ago + 0 comments

                Answer is in negative?

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