Question 1

Which of the following is NOT one of the three types of descriptive statistics?

Accepted Answer

A)  graphical statistics 
B)  inferential statistics 
C)  measures of central tendency 
D)  measures of variability 
A)  graphical statistics 
B)  inferential statistics 
C)  measures of central tendency 
D)  measures of variability

Question 2

If there is a .75 correlation between the hours that students devote to studying and their grades,

Accepted Answer

A)  a third variable, such as motivation and interest may account for the relationship. 
B)  we can conclusively say that this strong correlation indicates a causal relationship. 
C)  there is a weak, almost non-existent relationship. 
D)  there is a strong negative correlation. 
A)  a third variable, such as motivation and interest may account for the relationship. 
B)  we can conclusively say that this strong correlation indicates a causal relationship. 
C)  there is a weak, almost non-existent relationship. 
D)  there is a strong negative correlation.

Question 3

A very important aspect of representative samples is that their members are

Accepted Answer

A)  chosen by random selection. 
B)  chosen on the basis of central tendency. 
C)  chosen on the basis of equal variability. 
D)  significant members of the population. 
A)  chosen by random selection. 
B)  chosen on the basis of central tendency. 
C)  chosen on the basis of equal variability. 
D)  significant members of the population.

Question 4

Dr.Little is interested in studying the effects of a new medication on children with asthma between the ages of 6 and 12.She gets permission to try the medication on asthma patients in several hospital clinics.In this example,the sample includes children

Accepted Answer

A)  of all ages with asthma. 
B)  with asthma between the ages of 6 and 12. 
C)  with asthma ages 6 and 12 from the clinics where Dr.Little does her study. 
D)  with asthma of all ages who do not receive medication. 
A)  of all ages with asthma. 
B)  with asthma between the ages of 6 and 12. 
C)  with asthma ages 6 and 12 from the clinics where Dr.Little does her study. 
D)  with asthma of all ages who do not receive medication.

Question 5

A bar graph is to a histogram as dots connected by straight lines are to a

Accepted Answer

A)  diorama. 
B)  frequency polygon. 
C)  pictograph. 
D)  scatterplot. 
A)  diorama. 
B)  frequency polygon. 
C)  pictograph. 
D)  scatterplot.

Question 6

A particular advantage of the standard deviation is that it

Accepted Answer

A)  indicates the central tendency of a group of scores. 
B)  gives the score actually obtained by the greatest number of people. 
C)  does not require having to use the mean. 
D)  can be used to "standardize" scores to give them more meaning. 
A)  indicates the central tendency of a group of scores. 
B)  gives the score actually obtained by the greatest number of people. 
C)  does not require having to use the mean. 
D)  can be used to "standardize" scores to give them more meaning.

Question 7

When chance events are recorded,we find that some outcomes have a high probability and occur very often,others have a lower probability and occur infrequently,still others
Have little probability and occur rarely.As a result,the distribution (or tally)of chance
Events typically resembles a

Accepted Answer

A)  normal curve. 
B)  positive skew. 
C)  negative skew. 
D)  horizontal line. 
A)  normal curve. 
B)  positive skew. 
C)  negative skew. 
D)  horizontal line.

Question 8

One problem with the mean is that it

Accepted Answer

A)  is very difficult to compute. 
B)  is sensitive to extremely high or low scores. 
C)  gives the score actually obtained by the greatest number of people. 
D)  cannot be used in determining other statistical values. 
A)  is very difficult to compute. 
B)  is sensitive to extremely high or low scores. 
C)  gives the score actually obtained by the greatest number of people. 
D)  cannot be used in determining other statistical values.

Question 9

Which of the following is NOT an example of a question that could be answered using a correlational study?

Accepted Answer

A)  Does a new drug cause an improvement in memory for nonsense syllables? 
B)  Are socioeconomic and educational levels related to family size? 
C)  Do high school grades resemble college grades? 
D)  Is there a relationship between increases in rainfall levels and declines in crime rates? 
A)  Does a new drug cause an improvement in memory for nonsense syllables? 
B)  Are socioeconomic and educational levels related to family size? 
C)  Do high school grades resemble college grades? 
D)  Is there a relationship between increases in rainfall levels and declines in crime rates?

Question 10

The range and standard deviation are measures of

Accepted Answer

A)  central tendency. 
B)  variability. 
C)  frequency distribution. 
D)  correlation. 
A)  central tendency. 
B)  variability. 
C)  frequency distribution. 
D)  correlation.

Question 11

Which is NOT a measure of central tendency?

Accepted Answer

A)  mean 
B)  mode 
C)  range 
D)  median 
A)  mean 
B)  mode 
C)  range 
D)  median

Question 12

A major requirement for a sample to be used in psychological research is that it be

Accepted Answer

A)  statistically supportive. 
B)  significant. 
C)  practical. 
D)  representative. 
A)  statistically supportive. 
B)  significant. 
C)  practical. 
D)  representative.

Question 13

A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison.He is making use of

Accepted Answer

A)  descriptive statistics. 
B)  correlations. 
C)  inferential statistics. 
D)  z-scores. 
A)  descriptive statistics. 
B)  correlations. 
C)  inferential statistics. 
D)  z-scores.

Question 14

As the correlation coefficient gets closer to +1.00 or -1.00,then the relationship will be

Accepted Answer

A)  weaker. 
B)  stronger. 
C)  more variable. 
D)  harder it becomes to predict. 
A)  weaker. 
B)  stronger. 
C)  more variable. 
D)  harder it becomes to predict.

Question 15

Graphical statistics

Accepted Answer

A)  present numbers in a pictorial format. 
B)  numerically describe a "typical" score in a distribution. 
C)  show the arithmetic average of a set of data. 
D)  indicate how scores differ from each other numerically. 
A)  present numbers in a pictorial format. 
B)  numerically describe a "typical" score in a distribution. 
C)  show the arithmetic average of a set of data. 
D)  indicate how scores differ from each other numerically.

Question 16

Glenda has determined that the correlation between the math screening test and her students' math grade is .40. What percent of the variation in math scores is accounted
For by knowing the students' scores on the screening test?

Accepted Answer

A)  10 
B)  16 
C)  25 
D)  40 
A)  10 
B)  16 
C)  25 
D)  40

Question 17

A psychologist is interested in the effectiveness of a new method for teaching math to third graders.She is testing it on several third grade classes.In this example,the population is

Accepted Answer

A)  all third graders. 
B)  grade school students. 
C)  third graders in the classes tested. 
D)  the teaching method. 
A)  all third graders. 
B)  grade school students. 
C)  third graders in the classes tested. 
D)  the teaching method.

Question 18

Regarding correlation coefficients,which of the following statements is FALSE?

Accepted Answer

A)  The most commonly used correlation coefficient is called the Pearson r. 
B)  Correlations between most variables in psychology are rarely +1.00 or -1.00. 
C)  The strength of the correlation coefficient is determined by the sign in front of it. 
D)  The sign in front of the correlation coefficient depicts the type of relationship between the variables. 
A)  The most commonly used correlation coefficient is called the Pearson r. 
B)  Correlations between most variables in psychology are rarely +1.00 or -1.00. 
C)  The strength of the correlation coefficient is determined by the sign in front of it. 
D)  The sign in front of the correlation coefficient depicts the type of relationship between the variables.

Question 19

Kayla wants to create an organized summary of the number of people interested in each of the fifteen new products her company has designed.She should construct a

Accepted Answer

A)  frequency distribution. 
B)  range table. 
C)  variability matrix. 
D)  standard deviation scale. 
A)  frequency distribution. 
B)  range table. 
C)  variability matrix. 
D)  standard deviation scale.

Question 20

If there is a correlation of .78 between socioeconomic status and IQ score,which of the following statements is TRUE?

Accepted Answer

A)  A third variable such as education level may account for the relationship between socioeconomic status and IQ score. 
B)  Higher socioeconomic status will have a causal impact on IQ scores. 
C)  There is a weak relationship between socioeconomic status and IQ score. 
D)  Decreases in IQ scores will automatically result in lower socioeconomic status. 
A)  A third variable such as education level may account for the relationship between socioeconomic status and IQ score. 
B)  Higher socioeconomic status will have a causal impact on IQ scores. 
C)  There is a weak relationship between socioeconomic status and IQ score. 
D)  Decreases in IQ scores will automatically result in lower socioeconomic status.

Exam 19: Appendix A: Behavioral Statistics

Which of the following is NOT one of the three types of descriptive statistics?

If there is a .75 correlation between the hours that students devote to studying and their grades,

A very important aspect of representative samples is that their members are

Dr.Little is interested in studying the effects of a new medication on children with asthma between the ages of 6 and 12.She gets permission to try the medication on asthma patients in several hospital clinics.In this example,the sample includes children

A bar graph is to a histogram as dots connected by straight lines are to a

A particular advantage of the standard deviation is that it

When chance events are recorded,we find that some outcomes have a high probability and occur very often,others have a lower probability and occur infrequently,still others Have little probability and occur rarely.As a result,the distribution (or tally)of chance Events typically resembles a

One problem with the mean is that it

Which of the following is NOT an example of a question that could be answered using a correlational study?

The range and standard deviation are measures of

Which is NOT a measure of central tendency?

A major requirement for a sample to be used in psychological research is that it be

A psychologist concludes his method would be effective for teaching math to all third graders on the basis of testing it on a selected group of third graders with a control group for comparison.He is making use of

As the correlation coefficient gets closer to +1.00 or -1.00,then the relationship will be

Graphical statistics

Glenda has determined that the correlation between the math screening test and her students' math grade is .40. What percent of the variation in math scores is accounted For by knowing the students' scores on the screening test?

A psychologist is interested in the effectiveness of a new method for teaching math to third graders.She is testing it on several third grade classes.In this example,the population is

Regarding correlation coefficients,which of the following statements is FALSE?

Kayla wants to create an organized summary of the number of people interested in each of the fifteen new products her company has designed.She should construct a

If there is a correlation of .78 between socioeconomic status and IQ score,which of the following statements is TRUE?

A: Introduction to Psychology and Research Methods

B: Introduction to Psychology and Research Methods

C: Introduction to Psychology and Research Methods

A: Brain and Behavior

C: Brain and Behavior

A: Human Development

B: Human Development

C: Human Development

D: Human Development

A: Sensation and Perception

B: Sensation and Perception

C: Sensation and Perception

D: Sensation and Perception

A: States of Consciousness

B: States of Consciousness

C: States of Consciousness

D: States of Consciousness

A: Conditioning and Learning

B: Conditioning and Learning

C: Conditioning and Learning

D: Conditioning and Learning

A: Memory

B: Memory

C: Memory

A: Cognition,language,and Creativity

B: Cognition,language,and Creativity

C: Cognition,language,and Creativity

A: Intelligence

B: Intelligence

C: Intelligence

A: Motivation and Emotion

B: Motivation and Emotion

C: Motivation and Emotion

D: Motivation and Emotion

A: Gender and Sexuality

B: Gender and Sexuality

C: Gender and Sexuality

D: Gender and Sexuality Completion

A: Personality

B: Personality

C: Personality

D: Personality

A: Health,stress,and Coping

B: Health,stress,and Coping

C: Health,stress,and Coping

A: Psychological Disorders

B: Psychological Disorders

C: Psychological Disorders

D: Psychological Disorders

A: Therapies

B: Therapies

C: Therapies

D: Therapies

A: Social Thinking and Social Influence

B: Social Thinking and Social Influence

C: Social Thinking and Social Influence

A: Prosocial and Antisocial Behavior

B: Prosocial and Antisocial Behavior

C: Prosocial and Antisocial Behavior