You want to estimate the number of students in your school who prefer to bring lunch from home rather than buy one at school. Survey five students who are standing in the lunch line. Determine weather the sample is biased or unbiased. Explain

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.