SOLUTION: P(6 < x-bar < 8) = P(-0.3514 < z < +0.3514) = 0.2747 How did you get the 0.2747

Algebra ->  Probability-and-statistics -> SOLUTION: P(6 < x-bar < 8) = P(-0.3514 < z < +0.3514) = 0.2747 How did you get the 0.2747      Log On


   

Question 310258: P(6 < x-bar < 8) = P(-0.3514 < z < +0.3514) = 0.2747
How did you get the 0.2747
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
P(6 < x-bar < 8) = P(-0.3514 < z < +0.3514) = 0.2747
How did you get the 0.2747
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z = 0.3514 has a left tail of 0.6374
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z = -0.3514 has a left tail of 0.3626
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Therefore the area between z = -0.3514 and +0.3514 is
0.6374-0.3626 = 0.2748 or 2748, depending on how/if
you round off the numbers.
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Cheers,
Stan H.
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