If I can help with this question, feel like I am right there, but cannot figure it out. Thank you!

Your answer is partially correct. Try again. Two different formulas of an oxygenated motor fuel are being tested to study their road octane numbers. The variance of road octane number for formula 1 is 1 = 1.5, and for formula 2 it is 05 - 1.2. Two random samples of size 1 Jo and 2 - 2U are tested, and the mean octane numbers observed are X1 = 89. fluid ounces and X2 = 92.1 fluid ounces. Assume normality. (a) Test the hypotheses #o: #1 -#2 versus // 1: #1 - #2 using @ - 0.05. Round your answer to three decimal places (e.g. 98.765). -6.579 reject Ho- (b) Calculate a 95% two-sided confidence interval on the mean difference road octane number, ^1 "X2. Round your answer to three decimal places (e.g. 98.765). -4.023 SH1- H2 S -2.177 (c) What sample size would be required in each population if you wanted to be 95% confident that the error in estimating the difference in mean road octane number is less than 1? 01 = 02 = 11 Round your answer up to the nearest integer. Statistical Tables and Char