Coffee: The National Coffee Association reported that 63 % of U.S. adults drink coffee daily. A random sample of 250 U.S. adults is selected. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean us. The mean LA is 0.63 Part 2 of 6 (b) Find the standard deviation or. The standard deviation on is | 0.0305 Part: 2 / 6 Part 3 of 6 (c) Find the probability that more than 64 % of the sampled adults drink coffee daily. The probability that more than 64% of the sampled adults drink coffee daily isSmartphones: A poll agency reports that 86% of teenagers aged 12 -17 own smartphones. A random sample of 270 teenagers is drawn. Round your answers to at least four decimal places as needed. Part 1 of 6 (a) Find the mean JA. P The mean u. is 0.86 P Part: 1 / 6 Part 2 of 6 (b) Find the standard deviation GA. X 5 The standard deviation on isFuture scientists: Education professionals refer to science, technology, engineering, and mathematics as the STEM disciplines. A research group reported that 27 % of freshmen entering college in a recent year planned to major in a STEM discipline. A random sample of 85 freshmen is selected. Round the answer to at least four decimal places. Part 1 of 6 Is it appropriate to use the normal approximation to find the probability that less than 30% of the freshmen in the sample are planning to major in a STEM discipline? It is appropriate to use the normal curve, since np = 22.95 2 10 andn (1 - p) 62.05 10. Part: 1 / 6 Part 2 of 6 Find the probability that less than 30% of the freshmen in the sample are planning to major in a STEM discipline. The probability that less than 30% of the freshmen in the sample are planning to major in a STEM discipline is X 5Blood pressure: High blood pressure has been identified as a risk factor for heart attacks and strokes. The proportion of U.S. adults with high blood pressure is 0.4 . A sample of 39 U.S. adults is chosen. Use the TI-84 Plus Calculator as needed. Round the answer to at least four decimal places. Part 1 of 6 Is it appropriate to use the normal approximation to find the probability that more than 43 % of the people in the sample have high blood pressure? It is appropriate to use the normal curve, since np 15.6 10 and n (1 - p) = 23.4 10 . Part: 1 / 6 Part 2 of 6 Find the probability that more than 43 % of the people in this sample have high blood pressure. The probability that more than 43 % of the people in this sample have high blood pressure is