Scores on the math SAT are normally distributed. A sample of 20 SAT scores had standard deviation s = 95. Someone says that the scoring system for the SAT is designed so that the population standard deviation will be σ = 100. Do these data provide sufficient evidence to contradict this claim? Find the P-value. What do you conclude? Since , there sufficient evidence to contradict the claim.

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.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.