a sample of n=16 individuals is selected from a population with u = 30. After a treatment is administered to the individuals, the sample mean is found to be m = 33 . the researcher expects the treatments will increase scores on a variable. (a) assuming the sample variance is s^2 = 10 , conduct a hypothesis test to evaluate the significance of the treatment use a one-tailed test with alpha = 0.01. what conclusion would you draw? (b) assuming the sample variance is s^2 = 55, conduct a hypothesis test to evaluate the significance of the treatment effect. use a one-tailed test with alpha = 0.01. what conclusion would you draw? (c) describe how increasing variance affects the likelihood of rejecting the null hypothesis and the measure of effect size.
a sample of n=16 individuals is selected from a population with u = 30. After a treatment is administered to the individuals, the sample mean is found to be m = 33 . the researcher expects the treatments will increase scores on a variable. (a) assuming the sample variance is s^2 = 10 , conduct a hypothesis test to evaluate the significance of the treatment use a one-tailed test with alpha = 0.01. what conclusion would you draw? (b) assuming the sample variance is s^2 = 55, conduct a hypothesis test to evaluate the significance of the treatment effect. use a one-tailed test with alpha = 0.01. what conclusion would you draw? (c) describe how increasing variance affects the likelihood of rejecting the null hypothesis and the measure of effect size.
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