Test Bank for Statistics for Research and Life
Which of the following is a measure of central tendency that is most influenced by extreme
scores? - Answersmean
A researcher conducts an experiment to test the claim that new drug Y is more effective than
standard drug X in inhibiting arousal. The researcher randomly assigns participants to receive
drug Y or drug X and subsequently measures arousal. In this experiment, participants receiving
drug Y constitute the: - AnswersExperimental group
A market researcher is interested in ascertaining which of two possible packages is more likely
to entice buyers to purchase a new brand of chocolate chip cookies. In this study, which of the
following pairs represents the independent variable and the dependent variable respectively? -
AnswersThe different types of packages; total sales for each of the packages
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The dependent
variable in this study is the: - Answersproblem solving test scores
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The independent
variable in the study is the: - Answersnoise level
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The researcher's
conclusion that p=.05 most likely indicates: - AnswersThat the difference between the two
groups is statistically significant
,The double- blind procedure refers to a method of experimentation in which: - AnswersNeither
the participants nor the experimenter know which members are in the experimental group.
which of the following provides the best operational definition for studying road rage while
driving? - AnswersThe number of times a driver yells a swear word at another driver, during the
course of a two hour drive across town.
The population for an experiment consists of all the students in a local grade school. the school
consists of 70 boys and 30 girls. the best way to ensure that the actual participants in the
experiment represent the population as a whole would be to: - AnswersUse stratified samples.
The percentage of participants selected should be about 70% male and the percentage of those
assigned to each group should be about 70% male.
to follow someone around during the course of his/her free time, and writing down everything
he/she does would be an example of - Answersa naturalistic observation
To study Jack's linguistic development from the time he is born to age 20, would be an example
of - Answersa longitudinal study
In a well set up double blind experiment involving thousands of student participants who were
randomly put into groups, one group was given a cup of venti starbucks coffee, the other was
given de-caffeinated coffee. They were all given the same standardized test. the results
indicated no significant difference as to which group performed better, and both groups claimed
to have equal levels of energy and alertness. this can best be attributed to - Answersthe placebo
effect
to say there is a correlation coefficient of -.87 between number of scrambled eggs eaten in a
month and 400 meter times on the track, would indicate that - Answersthere is a strong
negative correlation between egg consumption and 400 meter times, but no cause and effect is
implied.
, Studies showing presidents IQs since 1960 indicate - Answersthat most of our presidents IQs
were at least, one standard deviation above the norm and many were two or more.
To say (today) that I knew all along that Donald Trump was going to win the presidency is an
example of - Answershindsight bias
what is the median of these numbers (9, 26, 7, 392, 4, 77, 2, 11) - Answers10
Sami scores a perfect 100 on a test that everyone else fails. If we were to graph this distribution,
it would be - Answerspositively skewed
Taylor and Bailey are lab partners assigned to research who is friendlier, girls or boys. after
conversing with their first 10 participants, they find that their friendliness ratings often differ.
with which of the following should they have the most concern? - Answersreliability
which of the following hypotheses would be most difficult to test experimentally? -
Answersdivorce often makes children more independent
Psychologists generally prefer the experimental method to other research methods because -
Answersexperiments cans how cause and effect relationships
Some psychologists consider Stanley Milgram's obedience studies to be unethical because of
which ethical consideration? - Answersrisk of long term harm
mia scored 145 on an IQ test with a mean of 100 and a standard deviation of 15. what is her z
score? - Answers+3
which of the following is an example of random sampling? i. picking out of a hat to assign each
of three classes to an experimental condition. ii. having a computer generate a random list of
Which of the following is a measure of central tendency that is most influenced by extreme
scores? - Answersmean
A researcher conducts an experiment to test the claim that new drug Y is more effective than
standard drug X in inhibiting arousal. The researcher randomly assigns participants to receive
drug Y or drug X and subsequently measures arousal. In this experiment, participants receiving
drug Y constitute the: - AnswersExperimental group
A market researcher is interested in ascertaining which of two possible packages is more likely
to entice buyers to purchase a new brand of chocolate chip cookies. In this study, which of the
following pairs represents the independent variable and the dependent variable respectively? -
AnswersThe different types of packages; total sales for each of the packages
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The dependent
variable in this study is the: - Answersproblem solving test scores
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The independent
variable in the study is the: - Answersnoise level
A researcher is studying the effect of noise level on concentration randomly assigns student
participants to either a noisy room or quiet room to take a problem-solving test. The researcher
subsequently compares the two groups using a t-test and concludes p=.05. The researcher's
conclusion that p=.05 most likely indicates: - AnswersThat the difference between the two
groups is statistically significant
,The double- blind procedure refers to a method of experimentation in which: - AnswersNeither
the participants nor the experimenter know which members are in the experimental group.
which of the following provides the best operational definition for studying road rage while
driving? - AnswersThe number of times a driver yells a swear word at another driver, during the
course of a two hour drive across town.
The population for an experiment consists of all the students in a local grade school. the school
consists of 70 boys and 30 girls. the best way to ensure that the actual participants in the
experiment represent the population as a whole would be to: - AnswersUse stratified samples.
The percentage of participants selected should be about 70% male and the percentage of those
assigned to each group should be about 70% male.
to follow someone around during the course of his/her free time, and writing down everything
he/she does would be an example of - Answersa naturalistic observation
To study Jack's linguistic development from the time he is born to age 20, would be an example
of - Answersa longitudinal study
In a well set up double blind experiment involving thousands of student participants who were
randomly put into groups, one group was given a cup of venti starbucks coffee, the other was
given de-caffeinated coffee. They were all given the same standardized test. the results
indicated no significant difference as to which group performed better, and both groups claimed
to have equal levels of energy and alertness. this can best be attributed to - Answersthe placebo
effect
to say there is a correlation coefficient of -.87 between number of scrambled eggs eaten in a
month and 400 meter times on the track, would indicate that - Answersthere is a strong
negative correlation between egg consumption and 400 meter times, but no cause and effect is
implied.
, Studies showing presidents IQs since 1960 indicate - Answersthat most of our presidents IQs
were at least, one standard deviation above the norm and many were two or more.
To say (today) that I knew all along that Donald Trump was going to win the presidency is an
example of - Answershindsight bias
what is the median of these numbers (9, 26, 7, 392, 4, 77, 2, 11) - Answers10
Sami scores a perfect 100 on a test that everyone else fails. If we were to graph this distribution,
it would be - Answerspositively skewed
Taylor and Bailey are lab partners assigned to research who is friendlier, girls or boys. after
conversing with their first 10 participants, they find that their friendliness ratings often differ.
with which of the following should they have the most concern? - Answersreliability
which of the following hypotheses would be most difficult to test experimentally? -
Answersdivorce often makes children more independent
Psychologists generally prefer the experimental method to other research methods because -
Answersexperiments cans how cause and effect relationships
Some psychologists consider Stanley Milgram's obedience studies to be unethical because of
which ethical consideration? - Answersrisk of long term harm
mia scored 145 on an IQ test with a mean of 100 and a standard deviation of 15. what is her z
score? - Answers+3
which of the following is an example of random sampling? i. picking out of a hat to assign each
of three classes to an experimental condition. ii. having a computer generate a random list of
