Critical value sample size calculator
[DOC File]AP Stats Chapter 10: Estimating with Confidence
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The figure below shows the results of taking 500 SRSs of size n = 4 and standardizing the value of the sample mean . The values of z follow a standard Normal distribution, as expected. The standardized values using the sample standard deviation sx in place of the population standard deviation σ, show much greater spread.
[DOC File]Power and Sample Size Calculation - Purdue University
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That function shows a relationship between power and sample size. 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. Using Statistical Package (SAS)
[DOC File]AP Stats Chapter 10: Estimating with Confidence
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The size of the population does not influence the sample size. (this is true as long as the population is much larger than the sample) Assignment: p. 637-639 10.13 to 10.18 Section 10.1 Exercises p. 640 10.19-10.20, 10.23, 10.26
[DOC File]Chi-Square test for Qualitative Data
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Step 4: Calculate Z using the graphing calculator or Excel (see Lewis or Root). Z Test for the Difference in Two Proportions Data Hypothesized Difference 0 Level of Significance 0.05 Group 1 Number of Successes 104 Sample Size 11037 Group 2 Number of Successes 189 Sample Size …
[DOC File]Statistics Calculator - My Math Genius
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And the critical value or a 1 tail upper at 1% is 2.33 . And the p-value for a 1-tail “upper” test is .001609866. Conclusion: Since our p-value is
[DOCX File]Mr Mayo's Math Web Site
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the sample size is large (n ≥ 30), and (2) the population is at least 10 times as large as the sample. As with confidence intervals for population proportions, we have to verify the Random, Normal, and Independent conditions.
[DOC File]Key Fact 7 - Montgomery College
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a) Compute the 90% confidence interval about µ if the sample size, n, is 45. 59.2 ± .9318 → (58.27, 60.13) For calculator feature use STAT, arrow to TESTS, and select 7:ZInterval, select Stats enter the required information, and CALCULATE. b) Compute the 90% confidence interval about µ if the sample size, n, is 55.
[DOC File]California State University, Sacramento
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(The values in the table below were calculated on my calculator) Populations Sample Size Sample Mean Sample Variance Pooled Variance df Critical Value Used Day 1 5 2.10 0.0050 0.0061 8 Day 2 5 2.28 0.0072 Note: Because the sample sizes were equal in this example, the pooled variance is just the average of the two sample variances.
[DOC File]Interval Estimator - (or confidence interval)
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One-Sample Test Test Value = 0 t df Sig. (2-tailed) Mean Difference 95% Confidence Interval of the Difference Lower Upper Siblings 19.498 168 .000 1.781 1.60 1.96 99% CI One-Sample Test Test Value = 0 t df Sig. (2-tailed) Mean Difference 99% Confidence Interval of the Difference Lower Upper Siblings 19.498 168 .000 1.781 1.54 2.02 Large sample ...
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