Hypothesis Tests of Means PDF
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This document discusses hypothesis tests of means, including different types of tests such as one-tailed and two-tailed tests. It explains the concept of comparing population means and provides examples of hypothesis testing scenarios, comparing means using different methods, and how to make the appropriate conclusion based on the hypothesis test.
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Ch 18 Hypothes is Test : Mean. satisfaction if R average= mean the variable ↑ variable we use to compare each grout Mean Related Test comm...
Ch 18 Hypothes is Test : Mean. satisfaction if R average= mean the variable ↑ variable we use to compare each grout Mean Related Test commonly Used in MR mean : When we want to make one judgement about the single · population mean a sample using ↳ can be one tailed or two tailed test eX. Is the average age of hroger's shopper 30 you a old ? · two unrelated samples : it is used to compare one sample to another ↳ Usually , the two sampler are two different groups of participants, am group of participants evaluated on different or the attributes eX. Do online hoppers seek more deal than offline coppers ? - - 1st grad ind grap · Two Related amples : used to compare the results of a group of ame the participants before and after a marketing action Y examiner the pue and post effect ex. Does the free trial increase the purchase intention & We will meanre participants before exporm to tre free trial and then after exposed to fulll trial to measure participation & We meanued the same group t at different times Unrelated vo Related Sample -tests * Th I groups are mutually exclusi , those who are tech-saly cannot be categorized non-techay Thus the samples are unrelated > null hypothesis :the - same > alternative - hypothes same gumps * comparing the at different time Will => hypothesis F alternative hypothesis Steps to follow inthypothes testing ↑ State the hypothesis : Very important to help or interpret the result after deciding our conclusion regarding the hypothes test 2 Select the tatifical test : Whether it is. a test ofassociation or independent , mainly the chi-squared test if its a comparison ofmeur test and what are, The Considerations (I tailed or 2 tailed ? ) (. Determine 3 i decision Me : based on the statistical test. H. Calculate the tatitical feet or P-value. 5 Make a decision and concreion One-Tail v. stwo Tail · one teited hypotheis test : determines whether a particular population parameter is larger or smaller than the predifined value - User one critical value of statitis in this care direction has been given to the hypothesis - a whether it is larger or maller · two Tailed hypothesis they determine the liklinood that test : a population parameter is within certain upper or lower bound may use one or two critical values - not all fet unethe same type of test hypothesis · Example comparison means · ofMeans E Two tailed test. Ho(null) : M No on = rejection mrejection s HlaH) : Mx = Mo * we don't specify if My is My (population mean) lower or higher but that They are different Mo (reference mean) E. One tailed test (Right) * if my population Ho : x Mo = mean is higher > My then it is ceptanceRecon Hi : MX = Mo one tail fest to the light EX one tailed test (Left) Ho : Mx Mo -un = ceptance a Decision Ruler fort-tests Why important to differentiate from For
