Answer:
one value of x would be x=5/2 and x=3/2
Step-by-step explanation:
Answer: V(X) = 0.96
Step-by-step explanation: <u>Variance</u> is defined as the average of the squared difference from the sample or population mean.
For a discrete frequency distribution is calculated following the steps:
1) Determine expected value or mean:


E(X) = 1.2
2) Multiply frequency and the squared difference of x and expected value:


3) Add them:
= 1008 + 36 + 384 + 972 = 2400
4) Divide the sum per frequency total:
![V(X)=\frac{\Sigma [f(x-E(X))^{2}]}{\Sigma f}](https://tex.z-dn.net/?f=V%28X%29%3D%5Cfrac%7B%5CSigma%20%5Bf%28x-E%28X%29%29%5E%7B2%7D%5D%7D%7B%5CSigma%20f%7D)

V(X) = 0.96
The variance of the number of cups of coffee is <u>0.96</u>.
What? What am I supposed to answer
7.5 + 9.5 + 13 = 30 <=== 3 odd numbers that equal 30...
<span>no te conozco otra forma , excepto para usar decimales</span>