Revisiting the comparison of LDL levels for males and females
In Exercise 7.62 (page 467), the LDL levels for males and females were compared using the two-sample t procedures that do not assume equal standard deviations. Compare the means using a signi?cance test and ?nd the 95% con?dence interval for the difference using the pooled methods. How do the results compare with those you obtained in Exercise 7.62?