SOLUTION: on the final exam in a large statistics class the average score was 76 with a standard deviation of 7. assuming a normal population, what scores were so deviant that their probabil

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Question 796691: on the final exam in a large statistics class the average score was 76 with a standard deviation of 7. assuming a normal population, what scores were so deviant that their probability of occurrence was .05 or less? (hint: .025 in each tail)
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
on the final exam in a large statistics class the average score was 76 with a standard deviation of 7. assuming a normal population, what scores were so deviant that their probability of occurrence was .05 or less? (hint: .025 in each tail)
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Find the z-value with a left tail of 2.5%
z = 1.96
Use x = z*s + u
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x = -1.96*7+76 = 62.28 (lower limit score)
x = +1.96*7+76 = 89.72 (upper limit score)
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Cheers,
Stan H.
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