sydneelittle3851 sydneelittle3851

02-07-2018
Mathematics

contestada

Let the random variable x be equally likely to assume any of the values 1/12, 1/6, or 1/4. determine the mean and variance of x.

Respuesta :

sqdancefan sqdancefan

02-07-2018

The mean of x is
(1/3)(1/12 + 1/6 + 1/4) = 1/6

The mean of the squares is
(1/3)((1/12)² + (1/6)² + (1/4)²) = 7/216

The variance is the difference between the mean square and the square of the mean.
7/216 -(1/6)² = 1/216

The mean of x is 1/6.
The variance of x is 1/216.

Answer Link

Otras preguntas

Select the correct answer. What is the best way to check the reliability and validity of a resource? OA. Determine the resource's original medium of production.

The data set shows the ages of the members of a book club. What is the shape of the distribution of this data set? 19, 21, 18, 19, 16, 21, 20, 17, 16, 17, 20, 1

What did the Mayan people use to keep time and why?

Around 9,000 years ago, where did farming first start in the Americas? Group of answer choices the Mississippi Valley the Ohio Valley around the Amazon River Me

answer question number 5

Plural for well-wisher?

x² + 2x²-3x-6 Get the zeros

William Stockers was slightly __________________.

Jamal is working with three ionic compounds: sodium chloride, calcium sulfide, and barium oxide. His teacher asks him which are the positive ions in each compou

What do you predict will happen as the colonists experience representative government and religious freedom? *