SOLUTION: The students at Littlewood high school cut an average of 3.3 classes per week. Random sample of 117 senior averages 3.8 cuts per week, with a standard deviation of 0.53. Are senior

Question 1041833: The students at Littlewood high school cut an average of 3.3 classes per week. Random sample of 117 senior averages 3.8 cuts per week, with a standard deviation of 0.53. Are seniors significantly different from the student body as a whole?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
The students at Littlewood high school cut an average of 3.3 classes per week. Random sample of 117 senior averages 3.8 cuts per week, with a standard deviation of 0.53. Are seniors significantly different from the student body as a whole?
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Ho: u = 3.3
Ha: u # 3.3
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x-bar = 3.8
t(3.8) = (3.8-3.3)/[0.53/sqrt(117)] = 10.204
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p-value = 2*P(t > 10.204 when df = 116) = 1/10^18
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Since the p-value is less than 1% reject Ho at
the 99% significance level.
-
The test results show the senior cut average is significantly
greater than 3.3.
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Cheers,
Stan H.
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