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[DOC File]Exam 3 Practice Questions
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27. B Use the sampling distribution of the sample proportion that you used above and the z-score. Look up 1.00 in the table. 0.8413 is listed in the table. This is the proportion less than, we want the proportion greater than so we take 1-0.8413=0.1587. 28. C ~N( p, ) when values of n, p satisfying np15 and n(1-p)15.
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[DOCX File]University of Arizona
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(using 2 – proportion . z. test on calculator we get . P≈0.00000000065 . which is clear evidence we should reject the null hypothesis and concluded that the proportion of young men and young women that live with their parents is different)We now want to look at the confidence interval by finding the difference in the sample proportions:
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[DOC File]Statistics Calculator - My Math Genius
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Now to compute the test statistic with the EXCEL calculator, do the following: Step1: make sure you are on the “Hypothesis Test” worksheet (there are 3 worksheets) Step2: Work under the heading: Hypothesis Test Proportion Step3: in the cell next to alpha enter .01 (the problem wants to test at 1%) Step4: in the cell next to Null enter .3
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[DOC File]Rossman/Chance
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(g) Indicate where the value of the observed sample proportion who leaned to the right falls in this sketch. (h) Calculate the z-score (test statistic) corresponding to the observed value of the sample proportion who leaned to the right. (Hint: Calculate a z-score by subtracting the mean and then dividing the difference by the standard deviation.)
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[DOCX File]Humble Independent School District
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This test statistic is so large that by Table A the P-value is very close to 0 (by calculator, P-value = 0.00014). Conclude: A P -value of 0.00014 is much less than _ = 0.05, so we reject H 0 . We have sufficient evidence to conclude that the proportions of people who experience adverse reactions to acetaminophen and ibuprofen are different.
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[DOCX File]University of Arizona
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A 99% confidence interval for the proportion . p. of all adult heterosexuals with multiple partners uses the standard Normal critical value . z * = 2.576. This value can be found using . InvNorm . on your calculator. Be sure to think about what value you would use for the area (probability). The confidence interval is
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[DOC File]One Proportion Z Test Worksheet
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One Proportion Z Test Worksheet. Any Boston Celtics fan or archrival knows that Shaquille O’Neal, one of the NBA’s most dominant centers of the last twenty years, always had difficulty shooting free throws. Over the course of his career, his overall made free-throw percentage is 53.3%. During this offseason, Shaq is working with an ...
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[DOC File]Rossman/Chance
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Conduct a two-proportion z-test of whether the observed difference in sample proportions is statistically significant. Use the 0.001 significance level. (Feel free to use technology.) Report the hypotheses, check technical conditions, sketch the sampling distribution, calculate test statistic and …
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[DOC File]Section 1
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Inference about One Proportion. Use the z statistic to carry out a test of significance for the hypothesis about a population proportion p against either a one-sided or a two-sided alternative. Check that you can safely use the one-proportion z test in a particular setting. Section 12.1: Tests about a Population Mean. Knowledge Objectives:
z test statistic proportion

[DOC File]Section 1
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2 Sample Proportion Test. Press STAT. Tab over to TESTS. Select 2-PropZTest and ENTER. Entry x1, n1, x2, n2 . Highlight test type (p1≠ p2, p1p1) Highlight Calculate and ENTER. Read z-critical and p-value off screen other information is there to verify. Classical: compare Z0 with Zc (from table)
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Z test statistic calculator proportion