natashalane1193 natashalane1193

01-07-2018
Mathematics

contestada

If the variance of a discrete random variable x is v(x) = 1.6, then v(2x + 3) is

Respuesta :

sqdancefan sqdancefan

01-07-2018

Adding an offset to the data changes the mean, but not the variance. Multiplying the data by a constant changes the variance by the square of that constant.
v(a·x) = a²·v(x)

You will have v(2x+3) = 2²·v(x) = 4·1.6 = 6.4

Answer Link

Otras preguntas

You pick two marbles from a bag and record their color. How can you make your selections independent events? Dependent events? A. Do not replace marbles after

The vertex of this parabola is at (-1,3) Which of the following could be its equation

Scientists use squid nerve cells in research because the nerve cells of a squid are 1,000 times fatter than those of a human. How is the outcome of nerve cell r

What are the characteristics of the graph of the inequality x < 5? It will use an open circle. The ray will move to the right. It will use a closed circle. T

Which drug is given to cardiac transplant patients in order to prevent the body from attacking the new organ?

Help!! I literally don’t know the answer

Add or remove commas of necessary Colon kaepernick drank tea with a polite, gnome in the forest

Possessive pronouns indicates who the owner will be. True or false No guessing need true answer.

I need help with these 2 questions on geometry PLEASE!!

What is most likely the length of a telephone book