Standard deviation點graph??

問題如下:

You will calculate the average miles driven for each week as well as the standard deviation. Then you will construct a graph that shows the average miles for each week including the standard deviation.

我想問點graph個average同standard deviation?-_-

我印象中冇graph過wor...

1 個解答

評分
  • 9 年前
    最愛解答

    其實有graph是包括standard deviation

    這條題目是要求變成normal distribution

    然後找出mean和standard deviation

    再利用Standard Normal Distribution Table進行畫圖

    y-axis 為average miles

    x-axis 為 Standard Normal Distribution

    其實x-axis 已包含standard deviation,如果整個圖的散佈程度為99.7%,由mean開始出發,跟mean相差一個standard deviation,那個圖的面積就是整個圖的34%;跟mean相差兩個standard deviation,那個圖的面積就是整個圖的13.5%;跟mean相差三個standard deviation,那個圖的面積就是整個圖的2.35%。

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