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  3. for questions 1-5, x1, x2, ... , x23 is a random s

For questions 1-5, X1, X2, ... , X23 is a random sample from a distribution with...

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Basic Math

For questions 1-5, X1, X2, ... , X23 is a random sample from adistribution with mean ? = -1.02 and variance ?2 = 0.62.

For questions 5-10, X1, X2, ... , X28 is a random sample from adistribution with mean ? = -8.77 and variance ?2 = 1.28.

1. Find ?x, the mean of the sample average.
2. Find ?2x, the variance of the sample average.
3. Find P(X ? -1.14).
4. Find P(X > -1.14).
5. Find P(-1.08 < X ? -0.94).
6. Find ?x, the mean of the sample average.
7. Find ?2x, the variance of the sample average.
8. Find P(X ? -8.47).
9. Find P(X > -8.47).
10.Find P(-9.02 < X ? -8.64).

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