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

How do the words grieving, sigh, and blight affect the mood of "Spring and Fall"? A. They add a note of sorrow to the poem's hopeful mood. B. They bring a reali

Which Portuguese nobleman led a fleet of 13 ships on a voyage to India but first sailed west to use the winds? A. Prince Henry the Navigator B. Vasco de Gama C.

how many 1/5-cup servings are in 3/4 of a cup of ice cream?

tell whether x and y show direct variation. xy=5

In Buddhism, the __________ provides a set of concepts to improve life and reach enlightenment. A. Torah B. Bible C. Qur’an D. Eightfold Path

Which Spanish monarchs pushed the Moors out of Spain? A. Henry VIII and Elizabeth I B. Francis I and Eleanor C. Ferdinand and Isabella D. Richard and Catherine

what is 6.6 as a fraction

Which of the following was a direct cause of the Panic of 1837? a The first Bank of the United States closed. b Congress lowered protective tariffs. c The feder

Why were industrial and agricultural surpluses a problem for the US economy?

How do the words grieving, sigh, and blight affect the mood of "Spring and Fall"? A. They add a note of sorrow to the poem's hopeful mood. B. They bring a reali