- #1

Kior

- 11

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Member warned about posting without the template and with no effort

I am preparing for my math probability class next semester. There is question: Calculate E(x

1.Why is the step hold? Is there a formula or something that i can calculate E[X-µ]

2.Why is the fourth step hold? Where is the σ from and why variance σ

^{3}_{µσ}) Would anyone explain the solution in the picture a little bit to me?1.Why is the step hold? Is there a formula or something that i can calculate E[X-µ]

^{n}?2.Why is the fourth step hold? Where is the σ from and why variance σ

^{2}= E[X-µ]^{2}?