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 shows the number of overtime hours worked by employees inx,bi7 oh 2w)y wz+bp/l *r/idkk64 g yiwf+o lub4, .i q-j6xyra company. l+gux* k4r 6dr4iyw/- k jyo.i6iqf,b

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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