STTS Questions With Correct Solutions (Rated A+)
An assumption underlying the use of regression analysis is that Right Ans -
the relationship between x and y is linear
Statistical regression is a potential threat to a study's internal validity when
Right Ans - participants are selected for inclusion in the study because of their
extremely high or low scores on the pretest
When a distribution of scores is normally shaped, approximately what percent
of scores fall between the mean and the scores that is one std above the mean
Right Ans - 34
The denominator term in the F-ratio is reduced in magnitude by Right Ans
- decreasing within group variability
Which of the following is the appropriate multivariate techniques when using
two or more continuous predictors to predict status on two or more
continuous criteria Right Ans - canonical correlation
a psychologist decides to use a single subject design to assess the impact of an
education intervention designed to increase on-task behavior, when
conducting her study, the psychologist will measure the participant's on tasks
behavior Right Ans - at regular intervals during the baseline and treatment
passes of the study
a researcher makes a Type II error when s/he Right Ans - retains the null
hypothesis when it is false
a psychologist compares the effectiveness of three brief interventions for
obsessive-compulsive disorder by a randomly assigning adults who have
received this diagnosis to one of the three interventions and measuring their
symptoms prior to the beginning of treatment and one week, one month, and
six months following treatment. the psychologist is using which of the
following types of research design Right Ans - mixed
when designing a research study, an investigator would be concerned about
the impact of pretest sensitization on his study's external validity if Right
Ans - taking the pretest changes how the participants react to the treatment
, the least squares criterion is used for Right Ans - identifying the line of best
fit in a regression analysis
a research participants score on the dependent variable is the amount of the
time -minutes- it took him or her to complete a task. when assigning scores to
participant, the researcher discovers that three of the 60 participants did not
complete the task, and he assigns them the maximum amount of time given to
participants to work on the task. the best measure of central tendency for the
data collected in this study would be wch of the following Right Ans -
median
an educational psychologist conducts a study to assess the effects of an
educational program designed to improve the academic performance of
children who have been diagnosed as mildly intellectually disabled. to do so
the psychologist matches 30 children with mild intellectual disability on the
basis of their IQ test scores and then randomly assigns the members of each
matched pair so that one member is assigned to the experimental group and
the other is assigned to the control group. she then administers the program
to the children in the experimental group and, following completion of the
program, administers an achievement test to all children and calculates a total
correct score of each child. to assess the effects of the treatment on
achievement test scores, the psychologist should use Right Ans - t-test for
dependent- related-samples
LISREL -linear structural relations analysis- would be the appropriate method
of analysis of your causal model Right Ans - includes both measured -
observed- attributes and latent traits
a teacher converts students' raw score of a 200 item test to percent correct
scores. the converted scores represent wch scale of measurement Right
Ans - ratio
when using stepwise multiple regression, the addition of predictors to the
equation is usually based on Right Ans - the magnitude of R-squared
when using a multiple baseline design a researcher will Right Ans -
sequential apply a treatment to different behaviors or participants
An assumption underlying the use of regression analysis is that Right Ans -
the relationship between x and y is linear
Statistical regression is a potential threat to a study's internal validity when
Right Ans - participants are selected for inclusion in the study because of their
extremely high or low scores on the pretest
When a distribution of scores is normally shaped, approximately what percent
of scores fall between the mean and the scores that is one std above the mean
Right Ans - 34
The denominator term in the F-ratio is reduced in magnitude by Right Ans
- decreasing within group variability
Which of the following is the appropriate multivariate techniques when using
two or more continuous predictors to predict status on two or more
continuous criteria Right Ans - canonical correlation
a psychologist decides to use a single subject design to assess the impact of an
education intervention designed to increase on-task behavior, when
conducting her study, the psychologist will measure the participant's on tasks
behavior Right Ans - at regular intervals during the baseline and treatment
passes of the study
a researcher makes a Type II error when s/he Right Ans - retains the null
hypothesis when it is false
a psychologist compares the effectiveness of three brief interventions for
obsessive-compulsive disorder by a randomly assigning adults who have
received this diagnosis to one of the three interventions and measuring their
symptoms prior to the beginning of treatment and one week, one month, and
six months following treatment. the psychologist is using which of the
following types of research design Right Ans - mixed
when designing a research study, an investigator would be concerned about
the impact of pretest sensitization on his study's external validity if Right
Ans - taking the pretest changes how the participants react to the treatment
, the least squares criterion is used for Right Ans - identifying the line of best
fit in a regression analysis
a research participants score on the dependent variable is the amount of the
time -minutes- it took him or her to complete a task. when assigning scores to
participant, the researcher discovers that three of the 60 participants did not
complete the task, and he assigns them the maximum amount of time given to
participants to work on the task. the best measure of central tendency for the
data collected in this study would be wch of the following Right Ans -
median
an educational psychologist conducts a study to assess the effects of an
educational program designed to improve the academic performance of
children who have been diagnosed as mildly intellectually disabled. to do so
the psychologist matches 30 children with mild intellectual disability on the
basis of their IQ test scores and then randomly assigns the members of each
matched pair so that one member is assigned to the experimental group and
the other is assigned to the control group. she then administers the program
to the children in the experimental group and, following completion of the
program, administers an achievement test to all children and calculates a total
correct score of each child. to assess the effects of the treatment on
achievement test scores, the psychologist should use Right Ans - t-test for
dependent- related-samples
LISREL -linear structural relations analysis- would be the appropriate method
of analysis of your causal model Right Ans - includes both measured -
observed- attributes and latent traits
a teacher converts students' raw score of a 200 item test to percent correct
scores. the converted scores represent wch scale of measurement Right
Ans - ratio
when using stepwise multiple regression, the addition of predictors to the
equation is usually based on Right Ans - the magnitude of R-squared
when using a multiple baseline design a researcher will Right Ans -
sequential apply a treatment to different behaviors or participants
