Question 3 Researchers want to develop a 90% confidence interval for the fraction of fruit flies which possess a gene for red eyes. They obtain a simple random sample of 200 fruit flies. They find that 35% of the flies in the sample possess the gene. Give a 90% confidence interval for the fraction of all fruit flies with the gene. A 0.25 to 0.45 C 0.28 to 0.42 0.26 to 0.44 D 0.29 to 0.41