A dog food manufacturer is considering two different food formulations, A and B, for a new, low-carb alternative. A sample of 100 dogs was randomly selected and fed with Formulation A, and after a month, Sample A showed a sample mean weight 32.5 lb with a standard deviation 2.4 lb. Another sample of 100 dogs was randomly selected and fed with Formulation B, and after a month, Sample B showed a sample mean weight 30.7 lb with a standard deviation 2.7 lb. Obtain the 95% confidence interval for the difference between the two population means. Which formulation should result in a lower average weight? [1.09 , 2.51]. Formulation B. [-1.09 , 2.51]. No significant difference. [1.09 , 2.51]. Formulation A. ) [-2.51 , 1.09]. No significant difference