Aresearcher wants to determine if a new regime of yoga and vitamin a will improve test-taking skills in college students. to ensure that participants in the experimental condition (i. e., those who will do yoga and receive vitamin a. are very similar to participants in the control condition (i. e., those who will be on a waiting list, thus receiving no treatment), the researcher should:

Mystic bottling company bottles popular beverages in the bottling department. the beverages are produced by blending concentrate with water and sugar. the concentrate is purchased from a concentrate producer. the concentrate producer sets higher prices for the more popular concentrate flavors. a simplified bottling department cost of production report separating the cost of bottling the four flavors follows: