Answer
The CI in exercise 37 is wider
Work Step by Step
$2650 \pm ( 1.96\times\frac{375}{\sqrt 50}$)
$2650 \pm 103.945$
CI: $2546.055 < \mu < 2753.945 \approx 2546.06 < \mu < 2753.95$
The CI in exercise 37 is wider because there is more variability in the population.
