Question 1

What is the mean for the following sample of scores? 2, 4, 6, 8

Accepted Answer

A)  20 
B)  10 
C)  5 
D)  4 
A)  20 
B)  10 
C)  5 
D)  4

Question 2

Dr. Wilson conducts an experiment and finds that the difference between the experimental and control group means is 45.3 units. This can be referred to as the

Accepted Answer

A)  effect size indicator 
B)  unstandardized difference between means 
C)  standardized difference between means 
D)  z score 
A)  effect size indicator 
B)  unstandardized difference between means 
C)  standardized difference between means 
D)  z score

Question 3

Inferential statistics involve the use of ______to draw conclusions about ___________.

Accepted Answer

A)  populations; samples 
B)  samples; populations 
C)  data sets; descriptive statistics 
D)  z scores; normal distributions 
A)  populations; samples 
B)  samples; populations 
C)  data sets; descriptive statistics 
D)  z scores; normal distributions

Question 4

After taking 23, 5-point, quizzes during the semester, both Jabari and Elaine have an average quiz score of 4.00. However, the standard deviation of Jabari's scores was .76 and Elaine's standard deviation was .25. What does it mean that Jabari and Elaine had the same quiz average but very different standard deviations?

Accepted Answer

A)  Jabari was above the class average but Elaine was below the class mean 
B)  Jabari was more consistent than Elaine 
C)  Elaine's individual quiz scores were closer to her average while Jabari's scores were more variable 
D)  Jabari performed better than Elaine 
A)  Jabari was above the class average but Elaine was below the class mean 
B)  Jabari was more consistent than Elaine 
C)  Elaine's individual quiz scores were closer to her average while Jabari's scores were more variable 
D)  Jabari performed better than Elaine

Question 5

The normal distribution follows within rounding) which of the following rules?

Accepted Answer

A)  the symmetrical rule 
B)  the central limit theorem 
C)  the 68, 95, 99.7 rule 
D)  the normal distribution rule 
A)  the symmetrical rule 
B)  the central limit theorem 
C)  the 68, 95, 99.7 rule 
D)  the normal distribution rule

Question 6

Assume that the correlation coefficient between class attendance and number of problems missed on an exam is -.77). Which of the following statements regarding this finding is correct?

Accepted Answer

A)  students who had fewer absences answered more questions correctly 
B)  students who had more absences answered more questions correctly 
C)  a negative correlation value is impossible; there must be a mistake in the calculations 
D)  the number of problems answered correctly is below the class mean 
A)  students who had fewer absences answered more questions correctly 
B)  students who had more absences answered more questions correctly 
C)  a negative correlation value is impossible; there must be a mistake in the calculations 
D)  the number of problems answered correctly is below the class mean

Question 7

What is the median of these numbers: 2, 7, 6, 8, 10 ?

Accepted Answer

A)  7 
B)  6 
C)  8 
D)  10 
A)  7 
B)  6 
C)  8 
D)  10

Question 8

Assume that within one study the regression equation relating daily saturated fat intake in grams x) to blood cholesterol level y) is Y-hat = 130 + 5X. What is the value of the regression coefficient?

Accepted Answer

A)  1 
B)  5 
C)  130 
D)  impossible to determine 
A)  1 
B)  5 
C)  130 
D)  impossible to determine

Question 9

What type of graph would be appropriate to display the frequency table of cat ownership shown below?

Accepted Answer

A)  bar graph 
B)  histogram 
C)  scatterplot 
D)  line graph 
A)  bar graph 
B)  histogram 
C)  scatterplot 
D)  line graph

Question 10

In a normal distribution, the percentage of raw scores falling within one standard deviation of the mean equals

Accepted Answer

A)  34.11%. 
B)  68.26%. 
C)  95.44%. 
D)  99.74%. 
A)  34.11%. 
B)  68.26%. 
C)  95.44%. 
D)  99.74%.

Question 11

What is the mode for the following sample of n = 8 scores? Scores: 0, 0, 1, 2, 2, 2, 2, 3

Accepted Answer

A)  2 
B)  2.5 
C)  12/8 = 1.50 
D)  12 
A)  2 
B)  2.5 
C)  12/8 = 1.50 
D)  12

Question 12

An)__________ coefficient predicts the change in a dependent variable given a one unit change in the independent variable.

Accepted Answer

A)  regression 
B)  correlation 
C)  ANOVA 
D)  ANCOVA 
A)  regression 
B)  correlation 
C)  ANOVA 
D)  ANCOVA

Question 13

SPSS is

Accepted Answer

A)  measure of effect size. 
B)  a method of randomly selecting participants from a population. 
C)  a statistical software package commonly used by psychologists. 
D)  used for descriptive statistics but not inferential statistics. 
A)  measure of effect size. 
B)  a method of randomly selecting participants from a population. 
C)  a statistical software package commonly used by psychologists. 
D)  used for descriptive statistics but not inferential statistics.

Question 14

When drawing a line graph, the dependent variable normally belongs on

Accepted Answer

A)  the horizontal axis. 
B)  the vertical axis. 
C)  either the horizontal or vertical axis. 
D)  horizontal axis unless the variable is nominal. 
A)  the horizontal axis. 
B)  the vertical axis. 
C)  either the horizontal or vertical axis. 
D)  horizontal axis unless the variable is nominal.

Question 15

The use of descriptive statistics involves

Accepted Answer

A)  summarizing your data so that it is easier for others to understand. 
B)  making inferences from your data to a population. 
C)  the use of both point and interval estimation. 
D)  hypothesis testing. 
A)  summarizing your data so that it is easier for others to understand. 
B)  making inferences from your data to a population. 
C)  the use of both point and interval estimation. 
D)  hypothesis testing.

Question 16

Use the following frequency distribution to answer questions 
  
-An ACT score of 22 made up what percentage of cases in the frequency distribution?

Accepted Answer

A)  10 
B)  15 
C)  20 
D)  30 
A)  10 
B)  15 
C)  20 
D)  30

Question 17

Professor Ganji jokes that there is a -.85 correlation between the number of courses a student takes with him and the student's grade point average. Which of the following is the best interpretation of this statement?

Accepted Answer

A)  in general, the more courses that students take from professor Ganji the lower their grade point average 
B)  the more courses students take from professor Ganji the higher their grade point average 
C)  professor Ganji is an easy instructor 
D)  students who take more of professor Ganji's class are guaranteed to have a higher grade point average 
A)  in general, the more courses that students take from professor Ganji the lower their grade point average 
B)  the more courses students take from professor Ganji the higher their grade point average 
C)  professor Ganji is an easy instructor 
D)  students who take more of professor Ganji's class are guaranteed to have a higher grade point average

Question 18

What is the median for the following set of scores? 1, 3, 3, 5, 8, 10

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 19

Research has indicated that there is a curvilinear relationship between the number of drinks a person has per day and their likelihood of developing heart disease. Calculating a regular correlation coefficient on these data would likely result in

Accepted Answer

A)  an artificially low value. 
B)  a value close to +1.00. 
C)  a value close to -1.00. 
D)  a value larger than 1.00. 
A)  an artificially low value. 
B)  a value close to +1.00. 
C)  a value close to -1.00. 
D)  a value larger than 1.00.

Question 20

A correlation coefficient is used to:

Accepted Answer

A)  examine the relationship between two quantitative variables 
B)  examine the relationship between three categorical variables 
C)  make a statement of causation in nonexperimental research 
D)  establish the time ordering of variables n. 
A)  examine the relationship between two quantitative variables 
B)  examine the relationship between three categorical variables 
C)  make a statement of causation in nonexperimental research 
D)  establish the time ordering of variables n.

What is the mean for the following sample of scores? 2, 4, 6, 8

Dr. Wilson conducts an experiment and finds that the difference between the experimental and control group means is 45.3 units. This can be referred to as the

Inferential statistics involve the use of to draw conclusions about _____.

The normal distribution follows within rounding) which of the following rules?

Assume that the correlation coefficient between class attendance and number of problems missed on an exam is -.77). Which of the following statements regarding this finding is correct?

What is the median of these numbers: 2, 7, 6, 8, 10 ?

Assume that within one study the regression equation relating daily saturated fat intake in grams x) to blood cholesterol level y) is Y-hat = 130 + 5X. What is the value of the regression coefficient?

What type of graph would be appropriate to display the frequency table of cat ownership shown below?

In a normal distribution, the percentage of raw scores falling within one standard deviation of the mean equals

What is the mode for the following sample of n = 8 scores? Scores: 0, 0, 1, 2, 2, 2, 2, 3

An)__________ coefficient predicts the change in a dependent variable given a one unit change in the independent variable.

SPSS is

When drawing a line graph, the dependent variable normally belongs on

The use of descriptive statistics involves

Use the following frequency distribution to answer questions -An ACT score of 22 made up what percentage of cases in the frequency distribution?

Professor Ganji jokes that there is a -.85 correlation between the number of courses a student takes with him and the student's grade point average. Which of the following is the best interpretation of this statement?

What is the median for the following set of scores? 1, 3, 3, 5, 8, 10

Research has indicated that there is a curvilinear relationship between the number of drinks a person has per day and their likelihood of developing heart disease. Calculating a regular correlation coefficient on these data would likely result in

A correlation coefficient is used to:

Introduction to Scientific Research

Research Approaches and Methods of Data Collection

Problem Identification and Hypothesis Formation

Ethics

Measuring Variables and Sampling

Research Validity

Control Techniques in Experimental Research

Experimental Research Design

Procedure for Conducting an Experiment

Quasi-Experimental Designs

Single-Case Research Designs

Survey Research

Qualitative and Mixed Methods Research

Inferential Statistics

Preparing the Research Report for Presentation or Publication

Filters

Exam 14: Descriptive Statistics

What is the mean for the following sample of scores? 2, 4, 6, 8

Dr. Wilson conducts an experiment and finds that the difference between the experimental and control group means is 45.3 units. This can be referred to as the

Inferential statistics involve the use of ______to draw conclusions about ___________.

The normal distribution follows within rounding) which of the following rules?

Assume that the correlation coefficient between class attendance and number of problems missed on an exam is -.77). Which of the following statements regarding this finding is correct?

What is the median of these numbers: 2, 7, 6, 8, 10 ?

Assume that within one study the regression equation relating daily saturated fat intake in grams x) to blood cholesterol level y) is Y-hat = 130 + 5X. What is the value of the regression coefficient?

What type of graph would be appropriate to display the frequency table of cat ownership shown below?

In a normal distribution, the percentage of raw scores falling within one standard deviation of the mean equals

What is the mode for the following sample of n = 8 scores? Scores: 0, 0, 1, 2, 2, 2, 2, 3

An)__________ coefficient predicts the change in a dependent variable given a one unit change in the independent variable.

SPSS is

When drawing a line graph, the dependent variable normally belongs on

The use of descriptive statistics involves

Use the following frequency distribution to answer questions -An ACT score of 22 made up what percentage of cases in the frequency distribution?

Professor Ganji jokes that there is a -.85 correlation between the number of courses a student takes with him and the student's grade point average. Which of the following is the best interpretation of this statement?

What is the median for the following set of scores? 1, 3, 3, 5, 8, 10

Research has indicated that there is a curvilinear relationship between the number of drinks a person has per day and their likelihood of developing heart disease. Calculating a regular correlation coefficient on these data would likely result in

A correlation coefficient is used to:

Introduction to Scientific Research

Research Approaches and Methods of Data Collection

Problem Identification and Hypothesis Formation

Ethics

Measuring Variables and Sampling

Research Validity

Control Techniques in Experimental Research

Experimental Research Design

Procedure for Conducting an Experiment

Quasi-Experimental Designs

Single-Case Research Designs

Survey Research

Qualitative and Mixed Methods Research

Inferential Statistics

Preparing the Research Report for Presentation or Publication

Filters

Inferential statistics involve the use of to draw conclusions about _____.