Answer Happy

#3) About 12% of the world population is left-handed. You decide to create a 99% confidence interval to test whether or not this proportion is true. a) Find the critical values needed to create your confidence interval. (1 point) b) If p = 0.12 is the last presumed proportion of pcople in the world population that was left-handed, what is the minimum sample size of people you would have to survey to create a confidence interval that has a margin of error no larger than 2 percentage points? Round your answer up to the nearest whole number. (2 points) c) If you surveyed 8000 people, and 1000 of them were left-handed, find the confidence interval upper and lower bounds. (2 points) d) Write an interpretation of what your confidence interval states in regards to the proportion of people who are left-handed (1 point)