Question

The number of cartoons watched on saturday mornings by students in mrs. kelly's first grade class is shown below. number of cartoons watched x 0 1 2 3 4 5 probability p(x) 0.15 0.20 0.30 0.10 0.20 0.05 what is the mean of the data?
a.1.37
b.2.15
c.1.89
d.1.18

Answer 1

The mean is the sum of the products of x and p(x). That is
     $\mu =\sum \left(x\cdot p\left(x\right)\right)$

     $\mu =0\left(0.15\right)+1\left(0.20\right)+2\left(0.30\right)+3\left(0.10\right)+4\left(0.20\right)+5\left(0.05\right)$

     $\mu =2.15$

The mean is 2.15.