1 . Jordan's cat "Fern " is a finicky eater . Jordan is trying to determine which of two brands of canned cat food Fern prefers , Tab- a - Cat or Chow Lion . For two months , she flips a coin each day to decide which of the two foods to feed Fern , and weighs how much Fern eats in Grams . Here is the data : 17 5 Tab - a - Cat 31 8.5. 2 | } 3. 45 Chow Lion 30 8.2 . 1\\. 4.52 ( a ) Find the standard error for the difference in the mean amount of Tab - a - Cat that Fell eats and the mean amount of Chow Lion she eats