A systematic sample does not qualify as a true random sample because ____.
a. the selection of the first individual is not random
b. the selections are not independent of each other
c. it does not use sampling with replacement
d. the entire population is not known
Although the rules surrounding the testing and approval of new drugs were indented to protect the public, these rules can also limit the access to drugs by people who are desperately ill. As a result of demands by ____ activists, the FDA eventually developed an expedited review process as well as a program to expand access to promising drugs.
a. AIDS
b. cancer
c. autism spectrum disorder
d. Alzheimer's disease
How does sample size affect the tcv?
What will be an ideal response?
One characteristic of random sampling with replacement is that it ____.
a. allows for the same individual to be selected more than once
b. allows the probabilities to vary from one selection to the next
c. ensures that the probability of individual selection increases as selection progresses
d. can be used even if the entire population is unknown
In a ____ study, the 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. pilot
b. Phase I
c. Phase II
d. Phase III
Rich performed a two-tailed test for an experiment in which n=15 . He could not find his t critical values table but he remembered the tcv at df = 20 . He decided to compare his tobt to this tcv. Is he more likely to make a Type I or a Type II error in this situation?
What will be an ideal response?
Simple random sampling is least likely to ____.
a. ensure that each individual has an equal chance of selection
b. remove all bias and discrimination from the selection process
c. guarantee that every individual in the population has a chance of being selected
d. guarantee that the sample will be representative and unbiased
In a ____ study, the drug or treatment is given to a larger group of people to see if it is effective and to further evaluate its safety.
a. pilot
b. Phase I
c. Phase II
d. Phase III
Rich performed a two-tailed test for an experiment in which n=20 . He could not find his t critical values table but he remembered the tcv at df = 15 . He decided to compare his tobt to this tcv. Is he more likely to make a Type I or a Type II error in this situation?
What will be an ideal response?
The major advantage of a simple random sample is that it ensures that ____.
a. there will be enough participants in each subset to be able to make statistical decisions
b. no single group is over-represented in the sample
c. the sample will provide an accurate representation of the population
d. the selection procedure is unbiased although its outcome may be biased
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