Discuss two reasons why data that is collected may not be valid
Two possible explanations for incorrect or invalid results include:
• They are biased due to a systematic error in measuring one or more outcome variables or there were systematic differences in the populations studied.
• The results are due to chance and do not represent the true state of affairs; that is, the observations made arose from random variations within the sample.
You might also like to view...
Table sugar is a disaccharide that is extracted from plants and thoroughly processed.
Answer the following statement true (T) or false (F)
Alen is a 30-year-old college student who has recently lost 30 pounds. He lost the excess weight by watching his diet and by working out. He still would like to lose the last ten pounds he gained through his 20s, most of which is in his torso area. He has become frustrated because his weight loss has slowed down. He has seen on the Internet and in several fitness magazines a product advertized as
a weight-loss supplement containing acai berry. The product ads state that the powerful antioxidants in the supplement will melt away fat and remove waste from the body while he is sleeping. Alen is tempted to purchase the product in an attempt to quickly lose his last 10 pounds. However, before he decides to purchase the acai berry supplement he learns that there are other ingredients in the product. The ingredients include ephedra, ginseng, coenzyme Q10, acai berry extract, chromium, potassium, caffeine, and chicory root. What should Alen do to lose the last ten pounds? A) Use the acai berry supplement and continue to work out and eat right B) Look for a different weight-loss supplement that is more effective and has been proven safe C) Be patient and continue to eat well and change up his workout routine D) Try a high-protein, low-carbohydrate diet and increase the duration of his aerobic workouts
Santiago has an inherited metabolic defect in which his cells have difficulty processing homocysteine to methionine. His physician may recommend vitamin ________ supplements to help Santiago's body metabolize homocysteine.
A. B-6 B. A C. D D. C
In a traditional culture, the evil eye can be blamed for causing illness when an envious enemy casts it
a. True b. False Indicate whether the statement is true or false