In Developing Confidence Interval for the Difference Between Two Population $s _ { p }$

True/False

In developing confidence interval for the difference between two population means using two independent samples,we use the pooled estimate $s _ { p }$
in estimating the standard error of the sampling distribution of the sample mean difference $\bar { x } _ { 1 } - \bar { x } _ { 2 }$
if the populations are normal with equal variances.