Answer
The CI in question 37 is smaller.
Work Step by Step
Formula for CI
$\bar{x}$ $\pm$ ( z$\times$$\frac{\sigma}{\sqrt n}$)
= $2,650 \pm ( 1.96\times\frac{425}{\sqrt 80}$)
= $2,650 \pm 93.132$
CI: $2,556.868 < \mu < 2,743.132 \approx 2,556.87 < \mu < 2,743.13$
The CI in question 37 is smaller because it has a lower sample size. A sample size of n = 50 gives less information about the population then a sample size of n = 80.
