A _____-tailed test and a _____ sample size will both increase the power of the test.
a. two; larger
b. one; larger
c. two; smaller
d. one; smaller
If deception is used, participants must be debriefed as soon as possible after the study.
a. True
b. False
Indicate whether the statement is true or false
In a Phase III study, a drug or treatment is given to large groups of people to confirm its effectiveness, monitor side effects, compare it to commonly used treatments, and collect information that will allow the drug or treatment to be used safely
a. True
b. False
Indicate whether the statement is true or false
In order to increase the power of z test, one might
a. increase sample size.
b. use a two-tailed test.
c. decrease sample size.
d. none of the options is correct
Although some forms of deception are allowed, a researcher cannot deceive participants about potential risk in the study.
a. True
b. False
Indicate whether the statement is true or false
Assent means that a child has not stated any objections to participating in a research study.
a. True
b. False
Indicate whether the statement is true or false
Which of the following is not an assumption of the z test?
a. The population mean (m) and standard deviation (s) are known.
b. The data are interval or ratio.
c. The distribution of random samples is normal.
d. The sample size is less than 30.
A written consent form that is signed by the researcher and the participant is required for all research with human participants.
a. True
b. False
Indicate whether the statement is true or false
FDA inspector Frances Kelsey refused to approve an application with what she viewed as insufficient safety data, even under pressure from her superiors, and thus, prevented the Thalidomide tragedy from occurring in the United States.
a. True
b. False
Indicate whether the statement is true or false
A researcher is interested in whether high school students who play sports have a higher or lower body mass index (BMI) than students in the general population. The researcher is unsure whether playing sports will decrease body mass (due to more calories burned) or increase body mass (due to more muscle mass). He compares their average BMI to that of students in the general population and finds that zobt = +1.92 . This is a _____ test and the researcher should conclude _____.
a. one-tailed; that students who are athletes have significantly higher BMIs.
b. two-tailed; that students who are athletes have significantly higher BMIs.
c. one-tailed: that students who are athletes do not have significantly higher BMIs.
d. two-tailed: that students who are athletes do not have significantly higher BMIs.
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