3 years ago

Help with multiple choices homework

Mathematics

1 answer:

ohaa [14]3 years ago

7 0

Step-by-step explanation:

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it would be 19 dollars a month

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3 years ago

Whats the answer HELP giving brainliest

mario62 [17]

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puteri [66]

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Step-by-step explanation:

hope that help with you question

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Let X1, . . . ,Xn be an i.i.d. random sample from a N(0, 1) population. Define Y1 = 1 n n X i=1 Xi , Y2 = 1 n n X i=1 |Xi| . Cal

nalin [4]

For each $1\le i\le n$ , $E[X_i]=0$ , so that

$\displaystyle E[Y_1]=E\left[\frac1n\sum_{i=1}^nX_i\right]=\frac1n\sum_{i=1}^nE[X_i]=0$

Meanwhile,

$\displaystyle E[Y_2]=\frac1n\sum_{i=1}^nE[|X_i|]$

Each of the $X_i$ have PDF

$f_{X_i}(x)=\dfrac1{\sqrt{2\pi}}e^{-x^2/2}$

for $x\in\Bbb R$ . From this we get

$E[|X_i|]=\displaystyle\frac1{\sqrt{2\pi}}\int_{-\infty}^\infty|x|e^{-x^2/2}\,\mathrm dx=\sqrt{\frac2\pi}\int_0^\infty xe^{-x^2/2}\,\mathrm dx=\sqrt{\frac2\pi}$

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3 years ago

Please Answer this question 15 points

WINSTONCH [101]

Answer:

btw it olny 8 points but it is c

Step-by-step explanation:

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3 years ago

Read 2 more answers