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

When a bird eats a small insect it can be considered a secondary consumer but what is the bird considered as when it eats seeds?

Traits are determined by ribosomes vacuoles genes mitosis

The continental army was successful at the battle of Yorktown in large part because of the

What is one reason that scientific names, instead of common names, help scientists to communicate about organisms?

All of the following describe a descriptive essay except A) abstract ideas B) colorful details C) strong opinions D) clear impression

What did Roosevelt’s response to the London Conference signal about the role of the United States in global affairs?The United States was turning toward policy

To combat doubt among people over social problems that challenged traditional religious beliefs, fundamentalists issued a set of beliefs. What are two of these

is dr. gomez a common noun omg helpppppppppp me !!!!!!!!! plz

Find the volume of the sphere

If you flip a coin 15 times what is the probability of getting exactly 6 heads