Chapter 4-1. Sample Size Determination and Power
... Linear Regression: Comparing two groups adjusted for covariates Usually when linear regression is applied in research, it involves the comparison of two groups after adjusting for potential confounders. That is, it is an adjusted means comparison problem. Sample size calculation, then, is simply on ...
... Linear Regression: Comparing two groups adjusted for covariates Usually when linear regression is applied in research, it involves the comparison of two groups after adjusting for potential confounders. That is, it is an adjusted means comparison problem. Sample size calculation, then, is simply on ...
Chapter 9
... C) The likelihood that any confidence interval based on a sample of 400 graduates will contain the population mean is 0.95 D) There is a 5% chance that the computed interval does not contain the population mean. Answer: C Difficulty: Medium Goal: 3 ...
... C) The likelihood that any confidence interval based on a sample of 400 graduates will contain the population mean is 0.95 D) There is a 5% chance that the computed interval does not contain the population mean. Answer: C Difficulty: Medium Goal: 3 ...
Chapter 7
... 2.3 percentage points in either direction from the percentage that would be found by interviewing all adults in the United States. Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved. ...
... 2.3 percentage points in either direction from the percentage that would be found by interviewing all adults in the United States. Copyright © 2010, 2007, 2004 Pearson Education, Inc. All Rights Reserved. ...
Equivalence Tests for Two Means in a 2x2 Cross-Over
... This procedure calculates power and sample size of statistical tests of equivalence of the means of a 2x2 cross-over design which is analyzed with a t-test. Schuirmann’s (1987) two one-sided tests (TOST) approach is used to test equivalence. Only a brief introduction to the subject will be given her ...
... This procedure calculates power and sample size of statistical tests of equivalence of the means of a 2x2 cross-over design which is analyzed with a t-test. Schuirmann’s (1987) two one-sided tests (TOST) approach is used to test equivalence. Only a brief introduction to the subject will be given her ...
8. Hypothesis: king cheetahs on average run the same speed as
... makes it more likely that you are near-sighted. (b) the p-value is small, so sleeping in a dark room makes it more likely that you are near-sighted. (c) the p-value is small, so a higher proportion of children who sleep in light rooms are near-sighted than who sleep in dark rooms. (d) because plit r ...
... makes it more likely that you are near-sighted. (b) the p-value is small, so sleeping in a dark room makes it more likely that you are near-sighted. (c) the p-value is small, so a higher proportion of children who sleep in light rooms are near-sighted than who sleep in dark rooms. (d) because plit r ...
Chapter 8
... of 3.21 is “unusual” (because it is greater than 2). It appears that in addition to being greater than 0.5, the sample proportion of 13/14 or 0.929 is significantly greater than 0.5. The figure on the next slide shows that the sample proportion of 0.929 does fall within the range of values considere ...
... of 3.21 is “unusual” (because it is greater than 2). It appears that in addition to being greater than 0.5, the sample proportion of 13/14 or 0.929 is significantly greater than 0.5. The figure on the next slide shows that the sample proportion of 0.929 does fall within the range of values considere ...
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... samples of the same size. In the long run, 9 of every 10 such intervals will contain μ. ...
... samples of the same size. In the long run, 9 of every 10 such intervals will contain μ. ...