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 one-sided 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
- Null hypothesis, Statistical hypothesis testing