Please I need help it’s due tomorrow and I don’t understand I need help on 1-10

Mathematics

1 answer:

aivan3 [116]3 years ago

4 0

for all of them calcuate whats in the prenteces first then use those numbers to solve the rest of the problem

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Answer:

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$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

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Step-by-step explanation:

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X 1060 1400 1620

P(X) 0.5 0.1 0.4

In statistics and probability analysis, the expected value "is calculated by multiplying each of the possible outcomes by the likelihood each outcome will occur and then summing all of those values".

The variance of a random variable Var(X) is the expected value of the squared deviation from the mean of X, E(X).

And the standard deviation of a random variable X is just the square root of the variance.

In order to calculate the expected value we can use the following formula:

$E(X)=\sum_{i=1}^n X_i P(X_i)$

And if we use the values obtained we got:

$E(X)=(1060*0.5) +(1400*0.1) +(1620*0.4)=1318$

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I believe that it’s D

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