Res342

RES 342 - Research and military rating II hebdomad 2 Notes 1.0 apoplexy Test for a iodin world Mean, Small sieve Size When a sample size (n) is small [less than 30, according to the commandment of thumb for the Law of tumid Numbers (Central Limit Theorem)], the spread of the property (characteristic) of interest of the be cosmos is non cognise to be normal, and the population commonplace deflection (?) is non known, for a guess test on the opine we must using up the t dispersal with (n - 1) degrees of emancipation instead of the z dispersal for the test statistic, which becomes a t-statistic [pic] since the population shopworn deviation (?) is not known and is estimated with the sample standard deviation (s). the like the z-statistic tests we die in hebdomad 1, t-statistic tests whitethorn be one-tailed or two-tailed, and ar conducted pursuit the Five-Step Procedure for hypothesis test we introduced in Week 1. The only differences are that the z-statistic changes to a t-statistic, and we now use the t distribution instead of the standard normal (z) distribution to recuperate the critical value or the p-value. 2.0 meditation Test for a Single people Proportion count we are fire in testing the value of the simile (?) possessing an designate (characteristic) of interest in a single population.

An ideal could be, the proportion of drinkers of a rely cola who prefer viands over regular. The sample calculator of ? is the sample proportion (p). p = [number in the sample possessing the attribute (characteristic) of interest] / (number in the sample) The variance of a population proportion (?) is ?2 = ? ? (1 - ?), so the test statistic is [pic] Like other z-statistic tests, these tests may be one-tailed or two-tailed, and are conducted following the Five-Step Procedure for Hypothesis test we introduced in Week 1. 3.0 Hypothesis Test for Two Population Means, Large Sample Size like a shot suppose we are interest in...If you want to get a full essay, order it on our website: Ordercustompaper.com

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