<prompt> All are true regarding students t-test, except-Standard error of mean is not estimatedStandard population is selectedTwo samples are comparedStudents t- test map is required for calculation  <response>: Ref:Parks 23rd edition pg 852 Student T test requires mean and SD Tests of significance: Qualitative: Chi- square : 2 or more than 2 groups Mc Nemar test : 1 group. before and after intervention Quantitative: Paired T test: 1 group Student T test unpaired T test: 2 groups Anova: more than 2 groups. 