Chapter 4: Q 66. (page 256)
Prayer and meditation You read in a magazine that 鈥渘onphysical treatments such as meditation and prayer have been shown to be effective in controlled scientific studies for such ailments as high blood pressure, insomnia, ulcers, and asthma.鈥 Explain in simple language what the article means by 鈥渃ontrolled scientific studies.鈥 Why can such studies provide good evidence that meditation is an effective
treatment for high blood pressure?
Short Answer
(a) The variation don't exist by chance.