Unformatted text preview: 0.1 = 1.28. 5. In this case you would reject the null hypothesis because z=8.571>z 0.1 =1.28. Based on this sample data you could say with a 90% confidence that your class is better with an average of 89 versus the standard average of 83. The test is onesided because the alternative hypothesis only falls into one side of the tails. Which would be at the greater end because we rejected the null hypothesis....
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 Winter '11
 talton
 Null hypothesis, Statistical hypothesis testing

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