0 votes
in Education by (1.7m points)
A class has 15 students whose ages are 14, 17, 15, 14, 21, 17, 19, 20, 16, 18, 20, 17, 16, 19 and 20 years. One student is selected in such a manner that each has the same chance of being chosen and the age X of the selected student is recorded. What is the probability distribution of the random variable X? Find mean, variance and standard deviation of X.

Select the correct answer from above options

1 Answer

0 votes
by (1.7m points)
 
Best answer
Let X denote the age of the students.

Then X can take the values 14,15,16,17, 18,19,20, 21
...