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Students at Claremore High School cut an average of 3.3 classes per month. A random sample...

Students at Claremore High School cut an average of 3.3 classes per month. A random sample of 125 seniors averages 3.8 cuts per month, with a standard deviation of 0.53. Are seniors significantly more likely to cut class than the student body as a whole? What is your estimate for the population mean number of classes cut per month by all seniors?

Math   Statistics-And-Probability   
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Answer #1

Given,

Estimate of population mean is sample mean, i.e.,

Our hypothesis is,

Test statistics:

Critical z value at 0.05 level of significance for one tailed test is 1.645

Since,

Therefore, we conclude that seniors are significantly more likely to cut class than the student body as a whole.

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