17. Fiona owns a soft-drink company and does a study of how many people drink her soft-drinks. She surveyed 50 people and found a mean average of 42% market share in one region of the province buy her soft drinks. There is a standard deviation of 3%. Construct a 95% confidence interval of how much of the market share her company has 18. Meron's commuting time from North Bay to Barrie varies uniformly from 135 min to 185 min. What is the probability that the drive will take in between 150 and 160 min? 19. Julianna has a pet turtle. The life span of a particular species of turtle is normally distributed with a mean of 180 years and a standard deviation of 40 years. What proportion of these turtles will live between 100 and 260 years? H In a sample of 1000 voters, a popular mayor, Aira, got 75% of the votes. She is 90% confident of this. If the standard deviation is 4%, what is the margin of error