BUAL 2650 Final Exam WITH ANSWERS

BUAL 2650 Final Exam WITH |\ |\ |\ |\ |\




ANSWERS

alpha (a) - CORRECT ANSWERS ✔✔-level of significance
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-allowance for a Type I error |\ |\ |\ |\ |\




-evidence is found significant we reject the null
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Hypothesis testing of proportions uses what tables? - CORRECT
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ANSWERS ✔✔z tables |\ |\




p-value - CORRECT ANSWERS ✔✔-the probability of the null
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being true
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-observed level of significance
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1-test statistic from table
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p-value < a - CORRECT ANSWERS ✔✔reject the null
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test statistic > CV - CORRECT ANSWERS ✔✔we reject the null
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, Two-Tailed p-value - CORRECT ANSWERS ✔✔the p-value of a two |\ |\ |\ |\ |\ |\ |\ |\ |\ |\



tailed test is both shaded areas added together
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An example in the judicial system - CORRECT ANSWERS ✔✔the
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null is that the defendant is "not guilty"
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Type I Error - CORRECT ANSWERS ✔✔-made in rejecting a null
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when it is actually true
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-false positive |\




Type II Error - CORRECT ANSWERS ✔✔-failing to reject the null
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when in fact it is false
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-false negative |\




Power of a Test - CORRECT ANSWERS ✔✔-the ability of the test to
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make the correct decision of rejecting the null when it is false
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-making the right decision |\ |\ |\ |\




-1-P(Type II) aka 1-Beta |\ |\ |\




-want it to be high |\ |\ |\ |\ |\




-as a increases, B decreases
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