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3. TWO different brands or milk are randomly sampled, and the fat content in each bottle of milk iS determined. Twenty-six DOttIES of Brand A milk yielded an average fat content of X1 = 25 grams with SE = 4, and thirtyr one bottles of Brand E! yielded an average fat content of X2 = 25.8 grams with s; = 7 (this question is worth 3 marks). Test the hypothesis that both brands have identical average fat content at the 5% level of signicance