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[PDF File]Claims About Two Proportions - Texas Instruments
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There are both one- and two-tailed tests. Once students are comfortable using the formula for the test statistic, they will learn to use the 2 Prop z test command. Topic: Hypothesis Testing. Calculate proportions. Determine test statistics for comparing two proportions. Find critical values and P-values of a normal distribution
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[DOC File]Exam 3 Practice Questions
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9. What should be the value of z used in a 93% confidence interval? a) 2.70 b) 1.40. c) 1.81 d) 1.89. 10. “What are the possible values of x-bar for all samples of a given n from this population?” To answer this question, we would need to look at the: test statistic. z-scores of several statistics. standard normal distribution. sampling ...
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[DOC File]Section 6 - Central Bucks School District
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Conditions met (Normal Model (1-Prop. Z-Test. We reject the Ho because the P-value of .0031 < . We have sufficient evidence that the true percentage of motorists who run red lights is less than 12%. 2. Saying that less than 12% of motorists run red lights when really it still is 12%. 3.
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[DOC File]Hypothesis Testing and Confidence Intervals
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One Proportion. 1 Proportion z-test. 1 Proportion z-int SRS? Normal? np > 10, n(1-p) > 10. Independent? 10n < pop. Stat/Test. 1propzTest or. 1propZInt More than 1 prop. 2 Categorical Variables. Tests: Goodness of Fit. Homogeneity. Independence SRS? All expected counts 5? N/A ... or ugly formula Stats/Test/ 2samplettest or 2sampletint Two ...
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[DOCX File]Teacher Websites at inetTeacher.com
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P=P z> -2 = 0.977 . P=2P z< -2.18 = 0.029 There is more than a 97% chance that the stated percentage is correct for this region. There is only a 2.9% chance of observing a p as far from 0.9 by sampling variation, so we believe the proportion of adults who drink milk here is different from the claimed 90%
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[DOC File]1 - Weebly
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Test statistic. formula and substitution—identify the appropriate test and substitute values. Check the assumptions or conditions. needed to be able to use this test statistic—each test has certain conditions under which it applies. III. Correct mechanics, including the value of the test statistic, df and P-value—this includes: Compute
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One prop z test formula