In a survey of 240 students in an elementary statistics class at the University of California, Davis (UCD), 20 said they were left-handed and 220...

In a survey of 240 students in an elementary statistics class at the University of California, Davis (UCD), 20 said they were left-handed and 220 said they were right-handed. Assume the students are represenative of all students at the school. Find a 93% confidence interval estimate of the proportion of left-handed students at UCD.