The elasticity of a polymer is affected by the concentration of a reactant. when low concentration is used, the true mean elasticity is 55, and when high concentration is used, the mean elasticity is 60. the standard deviation of elasticity is 4 regardless of concentration. if a random sample of size 16 is taken from each population, find the probability that x¯ high − x¯ low ≥ 8.5.

An optical inspection system is used to distinguish among different part types. the probability of a correct classification of any part is 0.92. suppose that three parts are inspected and that the classifications are independent. let the random variable x denote the number of parts that are correctly classified. determine the probability mass function of x. round your answers to four decimal places (e. g. 98.7654). x f(x) 0 1 2 3

Joanie wrote a letter that was 1 1/4 pages long. katie wrote a letter that was 3/4 page shorter then joagies letter. how long was katies letter

Sanderson is having trouble with his assignment. his shown work is as follows: − 3 7 7 3 = − 3 7 × 7 3 = − 21 21 = −1 however, his answer does not match the answer that his teacher gives him. complete the description of sanderson's mistake. find the correct answer.