Which of the following would be an appropriate placebo in an experiment to measure the effect of vitamin C on colds?
A. the recommended daily amount of vitamin C
B. half the recommended daily amount of vitamin C
C. a sugar pill that does not contain vitamin C
D. the recommended daily amount of vitamin D
ANS: C
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Which of the following forms of cancer is the most common in adult American women?
A. stomach B. breast C. liver D. lung
During statistical analysis, the investigator may consider searching for statistical associations among various groups that may suggest a cause–effect relationship, without having generated prior hypotheses about these groups. This is known as ____
a. selection bias b. data dredging c. measurement testing d. confounding bias
Prime examples of minerals that act as electrolytes and help to maintain body fluid balance are ____
A) calcium, iron, and phosphorus B) sodium, potassium, and chloride C) iodine, manganese, and selenium D) copper, zinc, and fluorine
The only leaveners in a traditional pound cake are air and steam.
Answer the following statement true (T) or false (F)