IB MAI HL Statistics & Probability Topic 4.1 Descriptive Statistics (id: b4eed30

本题目来源于试卷: IB MAI HL Statistics & Probability Topic 4.1 Descriptive Statistics，类别为 IB数学

[填空题]
The following table s1 gtjbfyx:)o,hwbu.8 hows the number of overtime hours wor dj:k2j v ;/sk,w7ljviked by employees in a companvjvjik;: l ,js dkw72/y.

It is known that the mean number of overtime hours is 1 .
1. Find the value of x .   
2. Find the standard deviation of the data. ≈   

参考答案:
空格1: 4±2%  空格2: 1.34±2% 


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