Sample size test of proportions
[DOC File]Power and Sample Size Calculation - Purdue University
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For each level of sample size, there is a corresponding sample size. For example, if n=20, the corresponding power level would be about 0.97, or, if the power level is 0.95, the corresponding sample size would be 16.
[DOC File]SDA: Survey Documentation and Analysis
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Estimated sample size for one-sample comparison of proportion. to hypothesized value. Test Ho: p = 0.5000, where p is the proportion in the population. Assumptions: alpha = 0.0500 (two-sided) power = 0.9000. alternative p = 0.6000. Estimated required sample size: n = 259 2. For a single measurement (a mean) in one sample. Command syntax:
[DOC File]Sample Size Calculations
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Sample Size Calculations for a Difference in Proportions The bottom part of the same spreadsheet generates sample size calculations for comparing differences in frequency of an event. Suppose, for example, that a given treatment was successful 50% of the time and you wanted to test a new treatment with the hope that it would be successful 90% ...
[DOC File]Sampling and Sample Size - Columbia University
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But, even if more complex methods of analysis will be used ultimately, it is easier and usually sufficient to estimate the sample size assuming a simpler method of analysis, such as the t-test or two means or chi-square test of two proportions.
[DOC File]Sample Size Estimation in the Proportional Hazards Model
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compute the sample size for which a hypothesis test would have prescribed power β to detect a specific “design” alternative ω1 > ω0; or. compute the alternative ω1 > ω0 which is rejected with prescribed power β when performing the hypothesis test with some given sample size n.
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