Hypothesis Testing Procedures Essay Example | Topics and Well Written Essays - 250 words

Hypothesis Testing Procedures - Essay exemplarWhen testing hypothesis for a population whose ideal deviation is not known, however, a researcher moldiness first con positionr a archetype standard deviation. This is wherefore used to estimate the population standard deviation towards generating the required standard computer error (Mendenhall, Beaver and Beaver, 2009).In testing for mean, and using the test statistic sexual climax to a two-sided hypothesis for a known standard deviation, a researcher would formulate a two-sided inconstant hypothesis. He would whence use the standard deviation to generate the standard error through dividing the standard deviation by square root of the sample size. A test statistic is then determined from the formula, (x-)/standard error and is compared with derived confidence limits from tables using /2 confidence level. This distributes the rejection region to either side of the distribution. The test statistic is then compared to the interval s for a decision on whether to reject or not to reject the null hypothesis. For an unknown population standard deviation, a researcher develops a two-sided hypothesis and applies a sample standard deviation to estimate the population standard deviation towards determining the standard error. The researcher then determines the test statistic and confidence intervals using a /2 confidence level, and compares them for a decision (Anderson, Sweeney, Williams, Greenman and Shoesmith,