Fathom for us to review.
Sleep was less than 8 hours, a "Y" was displayed. Otherwise an "N" was displayed. So, what is the point estimate for the proportion of the 47 students surveyed slept less than 8 hours? And what is the confidence interval? After we calculated it by hand, we used Fathom to confirm our results. Our conclusion is that we are 95% confident that the interval from 0.6702 to 0.9042 contains the true proportion of students who slept less than 8 hours the night before school started. It's crazy to think that students were lacking in sleep even before the school year started!