Nutrient. A nutritionist is studying the effect a protein product has on two genders. She advises two groups of people—underweight and average—to take the protein product as an additional supplement with their regular breakfasts. After a month, she records her analysis based on the weight gained by members of the two groups as shown in the following table.

Weight gained Body condition Gender Yes No Underweight Male Female 15 22 35 28 Average Weight Male Female 28 27 22 23

a) Compare the overall percentage of no weight gained between the two body weight conditions.

b) Based on the results in part

a, the nutritionist decided not to advise people to take the protein product if they want to gain weight. Do you agree with her decision? Why? Be specific.

c) The results here are an instance of what phenomenon?