if a change is positive for the population, does it change for the subgroups in which they are applied? how to test whether a change is positive or negative what is the difference between the direction of the change and that if a change is positive for the same subgroup which is the best way to show a change is positive or negative which test measures whether a change is better for one subgroup or worse for the other subgroup in a survey? what is the test for determining whether a change is good for all subgroups? why is a change significantly better for men or female how do you test for change direction and sex why is the trend change in the subgroup significant? can we test if a population is affected by a change in direction how do you test if a change is better for one subgroup or worse for another subgroup how do you test for a positive change on a subpopulation how do you test whether a change is positive how to determine whether population is changing which variable is affected by a change in direction when a subgroup is tested for change, which change is the best? when do you divide a population what is the purpose of the test for whether the change is negative or positive? what is the measure of the impact of a change? which test to do to check whether a change is significantly different in a subgroup?