You conduct a study on a group of individuals to examine the role of exercise in alleviating depression. You assign the first 50 people who are motivated to sign up to the experimental group, and the second group of 50 people, who sign up much later, to the control group. After one month, you find that the people in the experimental group (who exercised three times a week on average) are significantly less depressed than the people in the control group (who exercised once a week on average). Although you may be tempted to conclude that exercise helps stave off depression, you cannot because of the lack of in your study.

Morei would really appreciate it. his eyes snapped open. a musty smell flooded his senses. the room was lowly lit, curved with smooth light gray walls. the floor was clear black tiled. he stood up, surprised to see no door, but only a trap door on the ceiling that blended in with the walls. the room was unfurnished, which struck him as strange. as you write and revise, ask yourself these questions: 1. do all of the sentences in this paragraph belong here? (unity) 2. are all of the sentences in this paragraph in the right place? (coherence-- a method of development) 3. are all of the sentences in this paragraph smoothly connected together into a whole paragraph? (coherence--use of transitional devices) once you've made certain that your paragraphs are both unified and coherent, edit your work for problems in grammar and mechanics before submitting it to your teacher.

According to the theory of mercantilism, a country is strengthen by

Which of the following are offices under the jurisdiction of the executive office