Jaspreet wanted to find out if smokers could taste foods as well as non-smokers. Jaspreet baked two dozen lemon cookies with 1/4 teaspoon lemon extract. He used one dozen of each concentration of lemon to test 12 smokers to determine if they could detect the lemon flavoring and compared it to the concentration of lemon flavoring that 12 non-smokers could detect. Each participant received one of each type of cookie.