Transcription of CH9: Testing the Difference Between Two Means, Two ...
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CH9: Testing the Difference Between Two Means, Two ...
CH9: Testing the Difference Between Two Means or Two proportions Santorico - Page 343 CH9: Testing the Difference Between Two Means, Two proportions , and Two Variances CH9: Testing the Difference Between Two Means or Two proportions Santorico - Page 344 Section 9-1 Testing the Difference Between Two Means: Using the Z Test Suppose we are interested in determining if a certain medication relieves patients headaches. We give the drug/treatment to one group and give a placebo to a control group and compare the mean incidences of patient relief from the headache Between the two groups. If the treatment group had a statistically significant improvement in headache symptoms over the control group, then we can conclude the drug works.
CH9: Testing the Difference Between Two Means or Two Proportions Santorico - Page 350 Example: Dr. Cribari would like to determine if there is a statistically significant difference between her two Math 2830 classes. To make this comparison she will compare the results from exam 1. Class one had 35 students take the exam with a
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