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The following are the burning times (in minutes) of chemical ares of two different formulations. The design engineers are interested in both the mean and variance of burning times. Standard Deviation Observation {rt = n = 14} 34, 32, 27, 39, 24, 31, 2?, 31, 30, 28, 32, 34, 33, 34 35, 39, 4e, 44, 31, 4s, 35, 42, 22, so, 25, as, 34, 43 Average a) Test the hypothesis that the two variances are equal. Use a. = 0.05. b) Using the result of (a), test the hypothesis that the mean burning time of formulation Type-2 exceed that of Type-l by at least units. Use a = 0.05. c) Construct a 95% Condence interval on the difference of the means #1 p2