Stat 215 Quiz 6

Stat 215 Quiz 6 - Your Answer P(X<2) = 0.412...

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Stat 215 Quiz 6 Module: Quiz , Exercise: Normal Question Let X be Normal with mean 4 and variance 9. Determine: a) P(2.5 < X < 7) Answer P(2.5 < X < 7) = P(-0.5 < Z < 1) = 0.8413 - (1 - 0.6915) = 0.5328 Your Answer P(2.5<X Grader Comments (none) Grade 0.5 (out of 3.0) Total 3.5 (out of 10.0) Question Let X be Normal with mean 4 and variance 9. Determine: b) P(X < 2). Answer P(X < 2) = P(Z < -0.67) = 1 - 0.7486 = 0.2514
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Unformatted text preview: Your Answer P(X&lt;2) = 0.412 Grader Comments (none) Grade 1.0 (out of 3.0) Total 3.5 (out of 10.0) Question Let X be Normal with mean 4 and variance 9. Determine: c) c such that P(X &gt; c) = 0.3085 Answer z = 0.5; c = 4 + 3*0.5 = 5.5 Your Answer X = 8.5 Grader Comments (none) Grade 2.0 (out of 4.0) Total 3.5 (out of 10.0)...
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