Statistics final review- please help me learn how to do this problem?

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Here is a link to the table of "continuity corrections" . You need to "memorize" these for your test ...

http://people.richland.edu/james/lecture/m170/ch07...

p = 0.76

mean = np = 117(0.76) = 88.92

s.d. = sqrt(npq) = sqrt[(117)(0.76)(1-0.76)] = 4.62

Now use the Normal Approximation with continuity corrections ...

A) P(X = 98) = P(97.5 < X < 98.5) ... now convert to z-values:

P[(97.5 - 88.92) / (4.62) < z < (98.5 - 88.92) / (4.62)]

P( 1.86 < z < 2.07) = .0122

Use the same method and the table of "continuity corrections" to solve B, C and D.

Hope that helps

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