6i. 0V9!" 6ii. b) Suppose that a large manufacturing company has engaged a marketing rm to conduct a public-opinion survey to determine the percent of the population who favor the manufacturing company's product their competition. The marketing rm will conduct a random survey of public opinion for $1.25 per interview. How much will the survey cost the manufacturing company if the marketing rm insists that 95% of the time the margin of error be less than 3%? Also, assume that the manufacturing company's percent market share of the population is unknown as a conservative measure. A sample taken from a normally distributed population has a mean of 42 units with a standard deviation of 3.2 units. What is the probability that a randomly selected sample of n = 1 will be over 47 units? What is the probability, in a sample of 25 units, that the mean age will exceed 47 years