1.The populations have normal distributions. 2.The populations have the same variance (or standard deviation ) 3.The samples are random and independent of each other. 4.The different samples are from populations that are categorized in only one way
1.The populations have normal distributions.2.The populations have the same variance (or standard deviation )3.The samples are random and independent of each other.4.The different samples are from populations that are categorized in only one way