The mean of the probability distribution is 3 option (D) is correct if the project is graded on a scale of 1 to 5 and the random variable is X and the probability distribution is shown in the distribution graph.
What is probability?
It is defined as the ratio of the number of favorable outcomes to the total number of outcomes in other words the probability is the number that shows the happening of the event.
We have a project graded on a scale of 1 to 5. If the random variable.
As we can see in the table first column represents the random variables X
and the second column represents the frequency f.
In the third column, we have calculated the multiplication of random variables and frequencies.
Now calculating mean of the probability distribution:
= 0.1+0.4+1.2+0.8+0.5 (sum of the fX column data)
= 3
Thus, the mean of the probability distribution is 3.
Learn more about the probability here:
brainly.com/question/11234923
