Question: The president of Tastee Baby claims babies that eat her company’s food gain greater weight than by eating the competitor’s food. To test the claim, a survey is conducted. Fifteen mothers that feed their babies Tastee Baby baby food responded with weight-gain results (measured in ounces), and 25 mothers responded that feed their babies a competitor’s food. Using weight gain as a criterion, can we conclude at the 5% significance level that Tastee Baby baby food is indeed superior as claimed?

Taste Baby

30 37 36 36 39 29 31 38

37 39 42 44 41 37 38

Competitor

28 32 29 33 38 33 37

36 31 30 29 26 27 32

31 33 37 33 31 29 27

26 33 31 32