Ap psych (stats)

which of the following scatterplots illustrates the weakest correlation coefficient

B

An illusory correlation is best defined as a

perceived relationship where one does not exist

while reviewing scores from a chapter test, a teacher discovered that the mean score was higher than the median. Which of the following statements is most likely correct

The distribution of scores for the test is positively skewed.

Which of the following is the strongest correlation?

-.90

-3, 3, 0, 3, -3 What is the standard deviation of the numbers above?

3

3 4 5 5 7 7 7 8 8 10 Ten participants in a treatment group were asked to rate their feelings of self worth on a scale of one to ten, with a value of ten indicating a very positive feeling of self-worth. The data for the participants are above. What is the mean for these data?

6.4

A test has a mean of 80 with a standard deviation of 4. Which of the following scores is within one standard deviation of the mean?

77

Which of the following scatterplots shows the strongest relation?

E

what is the correct chronological order of the following perspectives of psychology, from past to present (behaviorism, psychoanalysis, structuralism, and humanism)

III, II, I, IV

in a normal distribution, which of the following statements is true about the area that falls between one standard deviation above and one standard deviation below the mean

It contains the middle 68% of the distribution.

Which of the following have been shown to have a positive correlation?

Perceived lack of control and learned helplessness

Which of the following is a valid conclusion that the researchers could have drawn from the data?

The new test produces scores that are generally unrelated to those produced by the original test.

emmit wants to examine whether there is a difference in the number of students with an internal locus of control and the number with an external locus of control based on class year. which of the following is the most appropriate research method for emmit to use to determine where there is a difference

a case study

standard deviation

a measure of variability that describes an average distance of every score from the mean

a professor conducts a survey examining the relationship between pessimism and mental health problems, and the results of her study are depicted in the scatterplot above. which of the following types of relationship between pessimism and mental health problems do her data suggest

a positive correlation

a research group conducted a study investigating the connection between self reported number of hours slept in a given week and scores on a happiness measure. based on the scatterplot above, the group can report that there is

a positive correlation

research finds that, in general, the higher an incoming college students scores on a given test, the higher the students college grade point average. which of the following best describes this relationship

a positive correlation

to determine whether a cause effect relationship exists between two variables, a researcher must use

an experimental approach

researchers have found a negative correlation between income and dental problems. what conclusion can be correctly drawn from this statement

an income increases, the likelihood of dental problems decreases

participants were asked to rate the importance of achieving honor roll status. the research team concluded that a students attitude towards school achievement is the result of family size. which of the following is the most important error made by the research team

assuming that correlation proves causation

The debate over whether development occurs gradually, without discernible shifts, or through a series of distinct stages is termed

continuity vs. discontinuity

which of the following is true of the frequency distributions shown in the graphs above (A, B, C)

distribution b has more variation than distributions A or C

of the following, a behavioral psychologist is most likely to study the

effects of token economies on establishing social skills among children with emotional disturbances

cognitive theories empathize the

formation and modification of schemas

one advantage of experiments over correlation studies is that experiments generally allow one to

infer cause and effect

The mean will be higher than the median in any distribution that

is positively skewed

experiemental research differs from correlational research in that experimental research

may reveal a causal relation

A test with normally distributed results was returned to a class of 100 students. Later, the teacher realized an error was made and added 10 points to each student's score. Which of the following must have changed as a result of the increase in scores?

mode

Which of the following measures can be precisely located on the graph of a skewed distribution without doing any calculations?

mode

Jane Goodall lived among wild chimpanzees intermittently for decades, studying their social and family systems while keeping her interaction with the chimpanzees to a minimum. Her research method can most accurately be described as

naturalistic observation

in studying the behavior of five year olds in free play situations, a cognitive psychologist would be most interested in the childrens

problem solving strategies

the notion that human behavior is greatly influenced by unconscious thoughts and desires is most consistent with which of the following psychological approaches

psychcodynamic

Which of the following is used to reduce the effects of confounding variables in experiments?

random assignment

Research shows that women who are referred by a physician to participate in a study of eating disorders have more severe problems than women who volunteer on their own to participate in the study. If research on eating disorders regularly involves only women referred by physicians, the results of the studies might be limited because of the presence of

sampling bias

the correlation between two measures obtained on a group of individuals is graphically represented as a

scatterplot

cognitive psychologists are most likely to study

the acquisition of knowledge, planning, and problem solving

which of the following statements is true of the above graphs (distribution A and B)

the mean is identical for both distributions, the standard deviation id larger for distribution A

mode

the most frequently occurring score(s) in a distribution