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[DOC File]AP Stats Chapter 11 Notes: Significance Tests
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significance level = 0.05 means: = 0.01 means: Statistical Significance: If the p-value is as small as or smaller than alpha, we say that the data are statistically significant at level . ***Significant in the statistical sense foes not mean “important.” It means simply not likely to happen just by chance.
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[DOC File]Review for TEST I
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The observed significance level (p-value) of the test is .03. Is this sufficient evidence to conclude that the mean satisfaction level of husbands with working wives is less than the mean satisfaction level of husbands with unemployed wives? Test using =.05. 7. In a study of the accuracy of telephone surveys, 720 people out of 1720 refused to ...
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[DOC File]Statistics Cheat Sheet
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Significance level α : if α = .05, then happens no more than 5% of time. "Results were significant (P < .01 )" Level α 2-sided test rejects Ho: μ = μo when uo falls outside a level 1 – α confidence int. Complicating factors: not complete SRS from population, multistage & many factor designs, outliers, non-normal distribution, σ unknown.
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[DOC File]ST 361 Normal Distribution
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Step 5: Conclusion: Since p-value < 0.05, we reject at the significance level 0.05. Ex2. Consider the true mean stopping distances at 50 mph for cars equipped with the braking system of brand A. It is known that the average stopping distances for braking system B is 120 inches. Result based on 36 cars equipped with brand A has mean 115.
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[DOC File]Exam 3 Practice Questions
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become narrower when the size increases and the confident level decreases. B. We will reject the null when the p-value is smaller than the significance level. The p-value . of this test is 0.044, which is smaller than the levels at .10, .05, but larger than .01. So we reject the H when =0.10 and .05, but fail to reject the null when =.01. 25. a. T.
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[DOC File]Lab 7: Hypothesis Testing
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What is a significance level? _____ 1.) Interpreting the Results of a Hypothesis Test . . . Scenario 1: Catsup Bottle Conspiracy . . . There are a variety of government agencies devoted to ensuring that food producers package their products in such a way that the weight or volume of the contents listed on the label is correct. ...
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[DOCX File]Amine Ouazad's Website — Amine Ouazad
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(b) Using a significance level of 95%, is the change in wait times statistically significant? Use a two-sided test since it seems the supervisor had to inspect the …
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[DOC File]St. John Fisher College
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Decide whether to reject H0 if the level of significance is α = 0.01. From the normal table z = -2.23 is P= 0.0129 which is the area in the left tail. Since 0.0129 > 0.01, you should fail to reject H0. Find the P-value for a two-tailed test with test statistic of z = 2.14. Decide whether to reject H0 if the level of significance …
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[DOC File]Test 11A
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A significance test allows you to reject a hypothesis in favor of an alternative Ha at the 5% level of significance. What can you say about significance at the 1% level? (a) can be rejected at the 1% level of significance. (b) There is insufficient evidence to reject at the 1% level of significance.
significance level definition

[DOC File]AP Statistics Worksheet section 12
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Carry out testing at the .05 significance level. Although arsenic is known to be a poison, it also has some beneficial medicinal uses. In one study of the use of arsenic it treat a rare type of blood cell cancer denoted by APL (for acute promyelocytic leukemia), APL patients were given an arsenic compound as part of their treatment.
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What is the significance level