In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national average for girls at this age is reported as follows: µ = 63.80 inches with a standard deviation,  = 2.66 inches. What is the effect size Cohen’s d and what does it tell us about the effect? An analysis was conducted to determine whether the average height of the 25 girls in the same class is different from the general population of 15-year old girls and the p-value was .024. If the researcher used  = .01 what is your decision and what do you conclude based on why the analysis was conducted?

In a class of twenty-five 15-year old girls the average height is M = 62.60 inches. The national average for girls at this age is reported as follows: µ = 63.80 inches with a standard deviation,  =...

In a class of twenty-five 15-year old girls the average height is
M
= 62.60 inches. The national average for girls at this age is reported as follows:
µ
= 63.80 inches with a standard deviation,  = 2.66 inches.

An analysis was conducted to determine whether the average height of the 25 girls in the same class is different from the general population of 15-year old girls and the p-value was .024. If the researcher used  = .01 what is your decision and what do you conclude based on why the analysis was conducted?

Jun 01, 2022