A) 28.5 |
B) 30.1 |
C) 30.5 |
D) 29.6 |
B) 30.1 |
Give that, \( \Large \sum^{20}_{i=1} \left(x_{i}-30\right)=2 \)
\( \Large \sum^{20}_{i=1}x_{i}-\sum^{20}_{i=1} \left(30\right)=2 \)
\( \Large \overline{x} = \frac{20.30}{20} + \frac{2}{30}=30+0.1=30.1 \)