Psychologists at the University of Minnesota compared the sc…
Psychologists at the University of Minnesota compared the scores of independent random samples of male and female 8th grade students who took a basic skills math achievement test to determine if males outperform females in math. A summary of the test score data is shown below: Males Females Sample size 1,764 1,739 Sample means 48.9 48.4 Sample standard deviations 12.96 11.85 Use a 90% confidence interval to estimate the true difference in mean test scores between males and females.