Z TESTING AT n LESS THAN 30

J joeb33050 Member May 14, 2021 #1 May 14, 2021 #1 Z TESTING AT n LESS THAN 30 Last edited: May 30, 2021

fed2 Active Member May 14, 2021 #3 May 14, 2021 #3 the question is in the first line Z and t testing are about: µ 1 = µ 2? Click to expand...

noetsi Loves R May 14, 2021 #4 May 14, 2021 #4 fed2 said: the question is in the first line Click to expand... This depends on whether the test is one tailed or two. For Null hypothesis H0: μ≥μ0 vs alternative hypothesis H1: μ<μ0 , it is upper/right-tailed (one tailed). For Null hypothesis H0: μ≤μ0 vs alternative hypothesis H1: μ>μ0 , it is lower/left-tailed (one tailed). For Null hypothesis H0: μ=μ0 vs alternative hypothesis H1: μ≠μ0 , it is two-tailed. https://en.wikipedia.org/wiki/Z-test

fed2 said: the question is in the first line Click to expand... This depends on whether the test is one tailed or two. For Null hypothesis H0: μ≥μ0 vs alternative hypothesis H1: μ<μ0 , it is upper/right-tailed (one tailed). For Null hypothesis H0: μ≤μ0 vs alternative hypothesis H1: μ>μ0 , it is lower/left-tailed (one tailed). For Null hypothesis H0: μ=μ0 vs alternative hypothesis H1: μ≠μ0 , it is two-tailed. https://en.wikipedia.org/wiki/Z-test