Research Methods for the Behavioral Sciences (MindTap Course List)
6th Edition
ISBN: 9781337613316
Author: Frederick J Gravetter, Lori-Ann B. Forzano
Publisher: Cengage Learning
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Chapter 7, Problem 8E
Identify the two active methods of preventing extraneous variables from becoming confounding variables.
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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?
A 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?
Chapter 7 Solutions
Research Methods for the Behavioral Sciences (MindTap Course List)
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. 7.4 - 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...
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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
- what would a positive association mean betwwen these two variables? briefly explain why a poaitive relationship might make sense in.this context.arrow_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
- Subject variables (such as gender) can be manipulated and treated like independent variables. True Falsearrow_forwardA 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_forward
- Forty-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_forward15 wheelchair users were randomly assigned to three groups with 5 in each group. These participants navigated in virtual-reality settings. Group 1 participants were in the virtual-reality setting (a building) as wheelchair users. Group 2 participants were in the virtual-reality setting in a wheelchair pushed by a walking person. Group 3 participants walked without aid in the virtual-reality setting. Joan measured the time each participant needed to complete the navigation of the virtual-reality setting. What is the independent variable(s)?arrow_forwardForty-five 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, 51% prefer life in prison without parole over the death penalty for a person convicted of first degree murder. 37.7% 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.Find P(L AND C ). (Round your answer to four decimal places.)P(L AND C ) =arrow_forward
- USE MANUAL SOLUTIONS NO EXCELarrow_forwardWhich of the following refers to the scenario in which the relationship between the dependent variable and one independent variable is different at different values of a second independent variable?arrow_forwardForty-seven 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, 51% prefer life in prison without parole over the death penalty for a person convicted of first degree murder. 37.3% 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.Find P(C|L). (Enter an exact number as an integer, fraction, or decimal.) P(C|L) =arrow_forward
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