The following function is probability mass function. x -2 -1 0 1 2
f(x) 1/9 2/9 3/9 2/9 1/9

Required:
Determine the mean and variance of the random variable.

The mean of the random variable is 0.

The variance of the random variable is of 1.11.

Step-by-step explanation:

We are given the following distribution:

Mean:

Sum of each outcome multiplied by its probability. So

The mean of the random variable is 0.

Variance of the random variable.

Sum of the probability of each outcome multiplied by the difference squared between the outcome and the mean. So

The variance of the random variable is of 1.11.

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

whatvare the choices

step-by-step explanation: