In a random sample size of five people the main drive distance to work was 21.5 miles in a standard deviation was 4.7 miles assume the population is normally distributed and using the distribution and 95% confidence interval for the population is 15.7 27.3 and the margin of error is 5.8 the research has been found at the population standard deviation of driving distances to work is 5.5 is the normal distribution with the appropriate calculations for a standard deviation that is known find the margin of error and constructed 95% confidence interval for the population