Z test is also known as Normal Distribution or Population distribution. * I point O True O False T test is also known as Sample Distribution * 1 point True False When variance or standard deviation are given, we can assume the data 1 point given be analyse using t test * True False When variance or standard deviation are given, we can assume the data 1 point given be analyse using Z test * O True O False Confidence interval can be use to decide HO and H1 as well as range of 1 point difference for the compared means U1 and U2* True False