RESEARCH METHODS FOR BEHAVIORAL...
6th Edition
ISBN: 2819280099110
Author: GRAVETTER
Publisher: CENGAGE L
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Chapter 10, Problem 12E
What characteristic differentiates a pretest-post test design from a time-series design?
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Chapter 10 Solutions
RESEARCH METHODS FOR BEHAVIORAL...
Ch. 10.1 - Define, compare, and contrast the experimental,...Ch. 10.2 - Define a nonequivalent group design and identify...Ch. 10.2 - Explain how individual differences threaten the...Ch. 10.2 - Describe the two nonexperimental nonequivalent...Ch. 10.2 - Explain how a simple modification of the...Ch. 10.3 - Define a pre-post design and identify examples of...Ch. 10.3 - Identify the threats to internal validity for...Ch. 10.3 - Describe the nonexpenmental pretest-posttest...Ch. 10.3 - Explain how replacing the single observation...Ch. 10.4 - Define cross-sectional and longitudinal designs,...
Ch. 10.5 - Identify the statistical techniques that are...Ch. 10.5 - Explain how the terms quasi-independent variable...Ch. 10 - In addition to the key words, you should also be...Ch. 10 - Explain the distinction between experimental and...Ch. 10 - Why are studies that examine the effects of aging...Ch. 10 - Explain why we can be more confident about causal...Ch. 10 - Give an example of a situation (aside from gender)...Ch. 10 - Mueller and Oppenheimer (2014) conducted a series...Ch. 10 - A researcher measures personality characteristics...Ch. 10 - A researcher wants to describe the effectiveness...Ch. 10 - Explain how the pretest helps minimize the threat...Ch. 10 - Describe the basic characteristics of a pre-post...Ch. 10 - To evaluate the effectiveness of a new television...Ch. 10 - What characteristic differentiates a pretest-post...Ch. 10 - Explain how a time-series design minimizes most...Ch. 10 - A researcher wants to describe how fine motor...Ch. 10 - Although the cohort effect can be a serious...Ch. 10 - Identify the appropriate statistical test for each...Ch. 10 - The college offers all students an optional...
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- A car wash is assessing the average wait time for its customers. The median wait time is 4 minutes. Does a customer who waits for 5 minutes represent an abnormal wait time? The customer who waits 5 minutes an abnormal case, because 50% of customers wait more than minutes.arrow_forwardUsing the t-table, find the critical value for a left-tailed test with a significance level of 10% and a sample size of 25.arrow_forwardA researcher conducted a research that majority of people who died during pandemic bought a new phone during last year. What type of research is this? If his assumption is correct which statistical test should be appropriate to analyze the data?arrow_forward
- Why would the following be conducted using a Simple Anova test? You work at an alcohol and substance abuse center and run a youth program. You want to determine which intervention works best to build self-esteem for youth in your program. Currently youth are in one of three intervention modes - (1) group counseling, (2) individual counseling and (3) a group and individual combo. Because of time constraints, you are only able to measure self-esteem at one point in time. You use a standardized multi item self-esteem scale to evaluate their level of self-esteem after 8 weeks of the intervention.arrow_forwardDue to the economy, are Americans staying in their first professional job longer? This was a ques- tion of interest for the Federal Jobs Bureau. In 2010, Americans were staying an average of 2.3 years in their first professional job. The data listed below is the length of time (in years) that eighteen randomly selected adults were staying in their first professional job. At the 5% significance level, what conclusion can be reached?arrow_forwardA type 2 error occurs when a treatment actually does have an effect on the scores but the effect was not large enough to reject the bill hypothesis. True or false?arrow_forward
- What is your interpretation if the result of the test has 2 or more sectors with two or more delays? Untestable Normal Abnormal Questionablearrow_forwardI purchased the fastest internet speed I could. The local company promised me 1.0 Gbps speed on average. I tested my connection once, and got 0.8 Gbps. If I assume that connection speeds follow an exponential distribution, and I use the test of hypothesis framework, does my single observation provide evidence that my true average internet speed is less than the 1.0 Gbps claimed? Use a 10% significance level.arrow_forwardLet's use SPSS to run a one-sample t-test! Imagine that you are interested in whether the number of hours students in a statistics course work each week differs from the average number of hours reported by the general student body at ASU. Thankfully, you have a data set that consists of information from students in a statistics course, including how many hours they work each week ("workhours"). You also happen to know that the average number of hours worked each week by the general student population at ASU is 25. Use the data provided to conduct a one sample t-test in SPSS comparing the sample data to the population mean.. The dependent variable for your test should be "workhours". Based on your output, the average number of hours worked each week by a sample is ________ . Enter your answer rounded to two decimal places (i.e., 10.01, not 10.1, not 10.0, not 10.010).arrow_forward
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