Following is the probability distribution for age of a student at a certain public high school. X 13 14 15 16 17 18 P(x) 0.08 0.23 0.23 0.28 0.15 0.03 (a) Find the variance of the ages. Round the answer to at least four decimal places. The variance of the ages is ☐ Try again X

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A: a) From the given table  P(Y=1)=0.158

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A:

Q: 3 4 2. 2 3 10 10 P(X) 10 10 10 2.

A:

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A: [Note: Since you have asked multiple questions, we will solve the first question for you. If you…

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A:

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A: mean(μ)=∑x.P(X)

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A: P(X≤2)= ?

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A: xp(x)…

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A:

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A: The formula of the mean is:

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A:

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A:

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A:

Q: Given the following probability distribution, Find P(x-2) 3 4 P(x=x) 0.2 0.05 0.2 0.25 P(x-2)%=D

A: In general, the total probability is always 1.

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