Question

A researcher wants to study the amount of protein in pet food. Which one of the following is most likely to give theresearcher more accurate results?-take a sample of cat foods alone-take a sample of dog foods alone-take a sample of all pet foods mixed together-divide the pet foods into two different groups, cat and dog, and take a sample from each group

Answer 1

He will need to take sample of at least two different sample of pet food in order to analyze it more accurate. So, the researcher should:

divide the pet foods into two different groups, cat and dog, and take a sample from each group.