You are here (click or tap to change) Back to Chapter 9 Main Page
Problem 2
9.1 Z-Interval to Compare Two Population Means: Independent Samples
Is there a difference between the quantitative problem solving skills of physical science majors (geology/physics/chemistry/…) and business majors? GRE quantitative test scores for both groups are summarized below. Find a 95% confidence interval for the true mean difference between the scores of physical science majors and business majors. Is there a significant difference? If so who does better?
physical science majors business majors n = 38 n = 42 sample mean = 692 sample mean = 594 s = 149 s = 151