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It’s a statistics expected value question. The picture is attached. In addition to finding the expected value, I also need to find the variance, standard deviation, the value of P(X ≥ -1), and P(X ≤ -3).

Its a statistics expected value question The picture is attached In addition to finding the expected value I also need to find the variance standard deviation t class=

Respuesta :

The Solution:

Given:

Required:

Find the expected value of X.

The formula:

[tex]E(x)=\sum_{i\mathop{=}-4}^0x_ip(x_i)[/tex][tex]E(x)=-4(0.2)+-3(0.3)+-2(0.1)+-1(0.2)+0(0.2)[/tex][tex]E(x)=-0.8-0.9-0.2-0.2+0=-2.1[/tex]

Thus,

Answer:

The expected value = -2.1

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