Construct a 90% confidence interval for H₁-H2 with the sample statistics for mean cholesterol content of a hamburger from two fast food chains and confidence interval construction formula below. Assume the populations are approximately normal with unequal variances. Stats x₁ =99 mg, s₁ = 3.93 mg, n₁ = 18 X280 mg, s2 = 2.02 mg, n₂ = 9 Confidence interval when (x-x2)-tc variances are not equal 01 + $2 < ոշ