The following information is obtained from two independent samples selected from two populations.
$n_1 = 127, \bar{x}_1 = 24.7, \sigma_1 = 5.3$
$n_2 = 162, \bar{x}_2 = 25.4, \sigma_2 = 5.8$
a. What is the point estimate of $\mu_1 - \mu_2$?
The point estimate for $\mu_1 - \mu_2$ is
b. Determine the 95% confidence interval for $\mu_1 - \mu_2$, and find the margin of error for this estimate.
Round your answers to two decimal places.
The 95% confidence interval for $\mu_1 - \mu_2$ is from to with the margin of error