RESEARCH METHODS-W/ACCESS >CUSTOM<
5th Edition
ISBN: 9781305743625
Author: GRAVETTER
Publisher: CENGAGE C
expand_more
expand_more
format_list_bulleted
Videos
Textbook Question
Chapter 7, Problem 8E
Identify the two active methods of preventing extraneous variables from becoming confounding variables.
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
What are the Irrelevant variables?
There is an interaction effect between two independent variables when the effect of an independent variable differs depending on the level of another independent variable.
True
False
A professor in a university is trying to conduct a research study. His study is trying to determine if his 8 am lecture is more interactive with him than his 2 pm lecture.
What is the independent variable?
How many levels are there for the independent variable?
What is the dependent variable?
Chapter 7 Solutions
RESEARCH METHODS-W/ACCESS >CUSTOM<
Ch. 7.1 - Describe the general purpose of an experimental...Ch. 7.1 - Define independent, dependent, and extraneous...Ch. 7.1 - Describe the third-variable problem and the...Ch. 7.2 - Explain why manipulation of an independent...Ch. 7.2 - Explain why control of extraneous variables is a...Ch. 7.2 - Explain how an extraneous variable can become a...Ch. 7.3 - Describe the three primary techniques for...Ch. 7.4 - Describe the purpose for control conditions in...Ch. 7.4 - Explain when a manipulation check is needed,...Ch. 7.5 - Define field studies and simulation, explain why...
Ch. 7 - In addition to the key words, you should also be...Ch. 7 - Dr. Jones conducted a study examining the...Ch. 7 - In an experiment examining human memory, two...Ch. 7 - It has been demonstrated that students with high...Ch. 7 - A researcher would like to compare two methods for...Ch. 7 - Define extraneous variable and explain how...Ch. 7 - Identify the two characteristics needed for a...Ch. 7 - Identify the two active methods of preventing...Ch. 7 - Explain how the process of randomly assigning...Ch. 7 - Can a research study be an experiment without a...Ch. 7 - What is the general purpose of a manipulation...Ch. 7 - What is the general purpose for using a simulation...Ch. 7 - Prob. 1EACh. 7 - A researcher examines the relationship between the...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, statistics and related others by exploring similar questions and additional content below.Similar questions
- Atlantic hurricanes form off the western coast of Africa. As warm moist air rises, it begins to rotate around a low- pressure system. This rotation is sustained by warm ocean temperatures and a central low pressure. Once a sustained wind speed of 74 miles per hour is reached, the storm is considered a hurricane. As man-made climate change continues to increase the temperature of the Earth's oceans, it is expected that the strength of hurricanes will Typically, a lower central pressure within a hurricane's eye is associated with a higher wind speed. Here, statistical software (R/RStudio) will be used to explore this relationship by applying linear regression methods. Using a database of landfalling hurricanes in the United States, a linear regression will be used to correlate the central pressure of each hurricane to its maximum sustained wind speed. increase. Regression Plot y=942.196-0.884*x R^2=0.768 ----- ----------- -. •... •. 980 1000 940 960 900 920 Independent Variable (x)…arrow_forwardA researcher wants to see if gender and / or income affects the total amount of help given to a stranger who is sitting on the side of a busy road with a sign asking for help. The independent variables are gender, income, and the interaction of gender and income. The dependent variable is total help. He wants to know if one or both factors – or the interaction of the two - affects the total amount of help offered. Because he is analyzing two independent variables (gender and income), he used a factorial ANOVA. His results show the main effect of each of the independent variables on the dependent variable (total help) and the interaction effect. The researcher is using a 95% confidence interval which means that he wants to be at least 95% sure that his independent variables affected total help if he rejects the null hypothesis. Below is the data set followed by the results:arrow_forwardA researcher wants to see if gender and/or income affect the total amount of help given to a stranger who is sitting on the side of a busy road with a sign asking for help. The independent variables are gender, income, and the interaction of gender and income. The dependent variable is total help. He wants to know if one or both factors – or the interaction of the two - affect the total amount of help offered. Because he is analyzing two independent variables (gender and income), he used a factorial ANOVA. His results show the main effect of each of the independent variables on the dependent variable (total help) and the interaction effect. The researcher is using a 95% confidence interval which means that he wants to be at least 95% sure that his independent variables affected total help if he rejects the null hypothesis. Is there significance for either gender or income?arrow_forward
- How to find independent and defendant variablesarrow_forwardA pediatrician keeps some basic health information about all his patients. Here are four of the variables that he keeps track of for each patient: • Body temperature (in degrees Fahrenheit, at time of doctor visit) • Eye Color (blue, brown, or green) • Height (in inches, at time of their last doctor visit) • Birth Order (whether they were born 1st , 2 nd , 3 rd, etc., among their sibling) Of these four variables, one is Nominal, one is Ordinal, one is Interval, and one is Ratio. Question 1. Match each variable with its scale of measurement. Of the four variables, state which one is Nominal, which is Ordinal, which is Interval, and which is Ratio. • Body Temp – ? • Eye Color -- ? • Height -- ? • Birth Order -- ?arrow_forwardA popular fast food chain wants to open an outlet in a particular district. The research department collected some data from the district. Among the variables collected were i. the number of persons who buy gasoline during a particular period ii. the number of business places in the district iii. the types of businesses in the district iv. the area of land used for each house in the neighborhood v the days of late closing of the businesses vi the number of students from the two schools in the area who wait for the bus near the proposed site of the outlet. SELECT ALL THE QUALITATIVE VARIABLESarrow_forward
- Cite and briefly describe scenarios where dependent and independent variables are employed.arrow_forwardThe owner of the Kosher Restaurant would like to determine the fixed and variable components of the restaurant's utility expenses. The owner believes that the variable component of the utilities cost is driven by the number of meals served. Meals Utilities served CostJanuary 3,600 P1,560February 2,000 P1,060March 2,900 P1,350April 3,500 P1,500May 3,900 P1,580June 2,100 P1,250July 1,900 P1,100August 1,000 P 850September 1,250 P 990October 1,400 P 880November 2,600 P1,180 Compute the expected utilities cost if 5,200 meals are served, using:The Lease - Squares Regression Methodarrow_forwardSubject variables (such as gender) can be manipulated and treated like independent variables. True Falsearrow_forward
- A scientist conducts research and discovers a link between variables A and B. The scientist claims that A is the cause of B based on this association. Is this statement correct? Explain.arrow_forwardCan someone help me with the following question please? Thank you so much!! A colleague speculates that countries with higher immigration rates are more likely to elect populist leaders, but only if these are presidential systems. What is the independent variable in this relationship? What is the dependent variable? What type of conceptual variable is “presidential system”? Draw the associated arrow diagram.arrow_forwardForty-two percent of all registered voters in a particular state prefer life in prison without parole over the death penalty for a person convicted of first degree murder. Among Latino registered voters in the state, 53% prefer life in prison without parole over the death penalty for a person convicted of first degree murder. 37.8% of all citizens in the state are Latino.In this problem, define variables as the following. • C = Registered voters preferring life in prison without parole over the death penalty for a person convicted of first degree murder. • L = Latino citizens Suppose that one registered voter is randomly selected.Are L and C independent events? Show why or why not. A)Yes, because P(C ) equals P(C|L). B)Yes, because P(C ) does not equal P(C AND L). C)No, because P(C ) equals P(C|L). D)No, because P(C ) does not equal P(C|L).No, because P(C ) equals P(C AND L).arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
MATLAB: An Introduction with ApplicationsStatisticsISBN:9781119256830Author:Amos GilatPublisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...StatisticsISBN:9781305251809Author:Jay L. DevorePublisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...StatisticsISBN:9781305504912Author:Frederick J Gravetter, Larry B. WallnauPublisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...StatisticsISBN:9780134683416Author:Ron Larson, Betsy FarberPublisher:PEARSON
The Basic Practice of StatisticsStatisticsISBN:9781319042578Author:David S. Moore, William I. Notz, Michael A. FlignerPublisher:W. H. Freeman
Introduction to the Practice of StatisticsStatisticsISBN:9781319013387Author:David S. Moore, George P. McCabe, Bruce A. CraigPublisher:W. H. Freeman
MATLAB: An Introduction with Applications
Statistics
ISBN:9781119256830
Author:Amos Gilat
Publisher:John Wiley & Sons Inc
Probability and Statistics for Engineering and th...
Statistics
ISBN:9781305251809
Author:Jay L. Devore
Publisher:Cengage Learning
Statistics for The Behavioral Sciences (MindTap C...
Statistics
ISBN:9781305504912
Author:Frederick J Gravetter, Larry B. Wallnau
Publisher:Cengage Learning
Elementary Statistics: Picturing the World (7th E...
Statistics
ISBN:9780134683416
Author:Ron Larson, Betsy Farber
Publisher:PEARSON
The Basic Practice of Statistics
Statistics
ISBN:9781319042578
Author:David S. Moore, William I. Notz, Michael A. Fligner
Publisher:W. H. Freeman
Introduction to the Practice of Statistics
Statistics
ISBN:9781319013387
Author:David S. Moore, George P. McCabe, Bruce A. Craig
Publisher:W. H. Freeman
what is Research Design, Research Design Types, and Research Design Methods; Author: Educational Hub;https://www.youtube.com/watch?v=LpmGSioXxdo;License: Standard YouTube License, CC-BY