Download Statistics for the Behavioral Sciences

Susan A. Nolan and Thomas E. Heinzen
Statistics for the Behavioral Sciences
Second Edition
Chapter 5:
Sampling and Probability
iClicker Questions
Copyright © 2012 by Worth Publishers
Chapter 5
1. A sample in which every member of the population has
an equal chance of being selected into the study is
called a:
a) convenience sample.
b) random sample.
c) general sample.
d) volunteer sample.
Chapter 5
(Answer)
1. A sample in which every member of the population has
an equal chance of being selected into the study is
called a:
a) convenience sample.
b) random sample.
c) general sample.
d) volunteer sample.
Chapter 5
2. Truly random samples are rarely used in research in the
social sciences because:
a) there is no way to know if a sample is random.
b) people vary too much, from person to person, in order
for them to be randomly selected.
c) science has not yet developed the methods and
procedures to allow for us to randomly select from a
population.
d) we almost never have access to the whole population
from which to select the sample.
Chapter 5
(Answer)
2. Truly random samples are rarely used in research in the
social sciences because:
a) there is no way to know if a sample is random.
b) people vary too much, from person to person, in order
for them to be randomly selected.
c) science has not yet developed the methods and
procedures to allow for us to randomly select from a
population.
d) we almost never have access to the whole
population from which to select the sample.
Chapter 5
3. When a researcher uses a convenience sample instead of
a random sample to conduct a study, the researcher is
limiting the study’s:
a) sample size.
b) confounds.
c) generalizability.
d) number of research participants.
Chapter 5
(Answer)
3. When a researcher uses a convenience sample instead of
a random sample to conduct a study, the researcher is
limiting the study’s:
a) sample size.
b) confounds.
c) generalizability.
d) number of research participants.
Chapter 5
4. Which of the following statements is true about random
assignment?
a) With random assignment research participants are
randomly placed into one of the conditions of the
experiment.
b) With random assignment research participants are
randomly selected into a study from a population.
c) Random assignment is necessary when designing a
correlational research study.
d) Random assignment will result in a flawed research
design.
Chapter 5
(Answer)
4. Which of the following statements is true about random
assignment?
a) With random assignment research participants
are randomly placed into one of the conditions of the
experiment.
b) With random assignment research participants are
randomly selected into a study from a population.
c) Random assignment is necessary when designing a
correlational research study.
d) Random assignment will result in a flawed research
design.
Chapter 5
5. The phenomenon of believing one sees an association
between variables when no such association exists is
called a(n):
a) confirmation bias.
b) null hypothesis.
c) illusory correlation.
d) Type I error.
Chapter 5
(Answer)
5. The phenomenon of believing one sees an association
between variables when no such association exists is
called a(n):
a) confirmation bias.
b) null hypothesis.
c) illusory correlation.
d) Type I error.
Chapter 5
6. The likelihood of an event occurring based on the actual
outcome of many, many trials is called:
a) personal probability.
b) expected relative-frequency probability.
c) subjective probability.
d) outcome-success-trail probability.
Chapter 5
(Answer)
6. The likelihood of an event occurring based on the actual
outcome of many, many trials is called:
a)
b)
c)
d)
personal probability.
expected relative-frequency probability.
subjective probability.
outcome-success-trail probability.
Chapter 5
7. To calculate probability which formula should you use?
a)
b)
c)
d)
Probability = failures/trials
Probability = outcomes/trials
Probability = successes/trials
Probability = trials/successes
Chapter 5
(Answer)
7. To calculate probability which formula should you use?
a)
b)
c)
d)
Probability = failures/trials
Probability = outcomes/trials
Probability = successes/trials
Probability = trials/successes
Chapter 5
8. A probability multiplied by 100 is called a:
a)
b)
c)
d)
proportion.
personal probability.
correlation.
percentage.
Chapter 5
(Answer)
8. A probability multiplied by 100 is called a:
a)
b)
c)
d)
proportion.
personal probability.
correlation.
percentage.
Chapter 5
9. The statement that postulates that there is no difference
between populations (or that the difference is in a
direction opposite from that anticipated by the
researcher) is called the:
a)
b)
c)
d)
experimental hypothesis.
null hypothesis.
research hypothesis.
rejected hypothesis.
Chapter 5
(Answer)
9. The statement that postulates that there is no difference
between populations (or that the difference is in a
direction opposite from that anticipated by the
researcher) is called the:
a)
b)
c)
d)
experimental hypothesis.
null hypothesis.
research hypothesis.
rejected hypothesis.
Chapter 5
10. Dr. Gullums completes an experiment where the mean
of the experimental group is significantly higher than the
mean of the control group (as she had hypothesized).
This will lead Dr. Gullums to:
a)
b)
c)
d)
reject the null hypothesis.
fail to reject the null hypothesis.
reject the research hypothesis.
do all of the above.
Chapter 5
(Answer)
10. Dr. Gullums completes an experiment where the
mean of the experimental group is significantly higher
than the mean of the control group (as she had
hypothesized). This will lead Dr. Gullums to:
a)
b)
c)
d)
reject the null hypothesis.
fail to reject the null hypothesis.
reject the research hypothesis.
do all of the above.
Chapter 5
11. If we reject the null hypothesis, but it was a mistake to
do so, it is called a(n):
a)Type I error.
b)Type II error.
c) Type III error.
d)Illusory correlation.
Chapter 5
(Answer)
11. If we reject the null hypothesis, but it was a mistake to
do so, it is called a:
a)
b)
c)
d)
Type I error.
Type II error.
Type III error.
Illusory correlation.
Chapter 5
12. Dr. Robinson conducted an experiment where she
failed to reject the null hypothesis even though it was
false. Psychologists call this a:
a) Type I error.
b) Type II error.
c) Type III error.
d) None of these.
Chapter 5
(Answer)
12. Dr. Robinson conducted an experiment where she
failed to reject the null hypothesis even though it was
false. Psychologists call this a
a) Type I error.
b) Type II error.
c) Type III error.
d) None of these.