A sample of 2,500 people was asked how many cups of coffee they drink in the morning. You are given the following sample information. Cups of Coffee Frequency0 7001 9002 6003 300total 2500The variance of the number of cups of coffee is (to four decimal places):

The variance of the number of cups of coffee is 0.96

Step-by-step explanation:

We are given the following in the question:

Cups of coffee,x:    0        1       2         3

   Frequency,f(x): 700    900    600    300

Formula:

Putting values, we get,

Variance =

Thus, the variance of the number of cups of coffee is 0.96

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8