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 xni+,j xx+ mz70 j zitc7z0.lbshows the number of overtime hours worked by employees in a 0.z+, 7+ lxmxbtxj niz7iz0j cchw :(gmrm7p c2di,d, company. , (dmc2hp d: c,g7rwmi

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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