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Hypothesis Test & Confidence Interval Calculator 1.0 This statistics calculator computes teststatistics and pvalues for standard hypothesis tests, as well as calculates confidence intervals. This app is a perfect addition to the many scientific and graphing calculators in the app store that do not possess this functionality. There are 26 solvers in this $0.99 (U.S. Store) app: Statistics Input:  1Sample ZTest  2Sample ZTest  1Proportion ZTest  2Proportion ZTest (pooled and unpooled) 

Sample Size 1.0 Stat Assistance’s sample size calculator allows users to calculate sample sizes needed for research and survey studies quickly, reliably, and easily without having to search the web for a sample size calculator or calculate sample size needed for research by hand. Why do you need to compute a sample size? In research it is very difficult to survey an entire population of people. Therefore, researchers use a sample size or sample population to 

95 95 Sample Size Calculator 1.0 This app allows you to calculate the sample size based on your choice of confidence level and reliability or LTPD. If you have been in the field of Quality Engineering, you would know about the famous 95/95 sample size. Here you can input any confidence level and reliability you need, and the app will give you the sample size and additional verbiage on what it means. This is based n Bayes' Success Run Theorem. 

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