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Data Notes Section 3

# Data Notes Section 3 - Data Notes Section 3 EX:1 I think...

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Data Notes Section 3 EX:1 I think grades on an actual exam are higher compared to the bonus exam b/c the risk associated with a bonus exam is lower. I want to prove above-stated guess using data. One Sample Problem? No Variable Nominal? No, because grades are interval Are they Related? Yes, because they are both all students are doing same tests. Ho: µ≥0 and Ha:µ<o Follow decision tree and find out to run t-test because samples are related then look at test statistic and see if the test statistic is consistent with the null. If not consistent then you fail to reject the null. If p-value in this case is less than alpha reject null. F-test = a procedure that we use to determine whether variance 1 equals variance 2. F-test is a hypothesis testing procedure and there are two constant hypothesis. Find out which applies and continue to correct t-test. Ho: variance 1 = variance 2 Ha: variances are not equal(≠) When running F-test always double p-value.

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