The following function is probability mass function. -2 -1 0 1 2 1/8 2/8 2/8 2/8 1/8 Determine the mean, , and variance, , of the random variable. Enter the exact answers (as fractions if necessary).

The mean of the random variable is 0.

The variance of the random variable is

Step-by-step explanation:

We are given the following probability distribution:

Mean:

Sum of each value multiplied by its probabilities. So

The mean of the random variable is 0.

Variance:

Sum of the difference squared between each value and the mean, multiplied by its probabilities. So

The variance of the random variable is

the answer is the third / last answer

step-by-step explanation:

inch

step-by-step explanation:

yard and mile are too big.