Let X denote the number of VCRS sold during a random week by a certain store. The probability function of X is r f(x)

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Chapter1: Starting With Matlab
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Let X denote the number of VCRS sold during a
random week by a certain store. The probability
function of X is
x f(x)
0
0.6164
1 0.0956
2
0.0354
3
0.0461
4 0.2065
Calculate the variance of Y = 4X + 2.
:
Var (Y)
=
Y
Note: You can calculate the variance of Y using the
definition of variance: o = E[Y - µy]. However,
you have to calculate first the expected value of Y,
μy = E[4X + 2].
Transcribed Image Text:Let X denote the number of VCRS sold during a random week by a certain store. The probability function of X is x f(x) 0 0.6164 1 0.0956 2 0.0354 3 0.0461 4 0.2065 Calculate the variance of Y = 4X + 2. : Var (Y) = Y Note: You can calculate the variance of Y using the definition of variance: o = E[Y - µy]. However, you have to calculate first the expected value of Y, μy = E[4X + 2].
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