PLEASE ANSWER AS SOON AS POSSIBLE
3. A jar containing 120 flies was sprayed with an insecticide of Brand A and it was found that 95 of the flies were killed. When another jar containing 145 flies of the same type was sprayed with Brand B, 124 flies were killed. a) Is Brand B more effective in killing flies. (5 Points.) b) Find the 90 percent confidence interval for the difference in the Brand proportions. (3 Points)