1. in a survey sample of 83 respondents, about 30.1 percent of the sample work less than 40 hours per week. calculate a 68 percent confidence interval for the proportion of persons who work less than 40 hours per week.

It's like discovering the answer to a puzzle. the purpose in solving an equation is to find the value or values of the variable that makes it a true statement. any value of the variable that makes the equation true is called a solution to the equation.