The independent variable is used to divide participants into groups to manipulate the treatment of interest,...
The independent variable is used to divide participants into groups to manipulate the treatment of interest, and should be measured on a categorical scale. a) True b) False
Homework Answers
answer:
The statement is True
correct option :option a
Because the independent variable is used to divide participants into groups to manipulate the treatment of interest, and should be measured on a categorical scale
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The independent variable is used to divide participants into
groups to manipulate the treatment of interest,...
1. the reason why the independent variable might not have caused an effect on the dependent...
1. the reason why the independent variable might not have caused an effect on the dependent variable are called threats to internal validity? A. true B. False 2. The use of existing natural groups of participants usually results in equivalent groups for an experiment A. true B. false 3. Mortality refers to the facts that participants may drop out of the experiemnts A. true B. false 4. A defining characteristics of an experiment is the unbiased assignment of participants to...
If an independent-groups t test has seven participants in each group, then the degrees of freedom...
If an independent-groups t test has seven participants in each group, then the degrees of freedom are a) 12 b) 7 c) 14 d) 6 If the null hypothesis is true, then the t test should be close to a) ±1.96 b) ±3.00 c) 0.00 d) ±1.65
TRUE OR FALSE 5. In addition to ethical guidelines for research with human participants, there are...
TRUE OR FALSE 5. In addition to ethical guidelines for research with human participants, there are published guidelines for research with animals. 6. Survey researchers suggest that participant observation yields invalid data because the observers, simply by being there, change people's behaviour. 7. The diversity of participants in research is, among other things, not an ethical issue. 8. The researcher manipulates all independent variables. 9. The researcher may choose to manipulate the independent variable in order to see what effect...
Question 2 1 pts For an independent-measures ANOVA comparing four treatment conditions, dfbetween=3. True False Next...
Question 2 1 pts For an independent-measures ANOVA comparing four treatment conditions, dfbetween=3. True False Next For an analysis of variance comparing four treatment means with a separate sample of a participants in each treatment, the F-ratio will have df - 3.31, 8 True False Next →
9. What are the three required assumptions for the appropriate use of the independent groups t-test?...
9. What are the three required assumptions for the appropriate use of the independent groups t-test? What are the three required assumptions for the appropriate use of the dependent groups t-test? Can you use these tests when you have three groups? What test do we use instead? Can the dependent variable be nominal? What should the nature of the dependent variable be? Consider your answers to the previous question when you answer the next two questions: 10. For which of...
1.Given an interval or ratio scale dependent variable and a nominal independent variable with three or...
1.Given an interval or ratio scale dependent variable and a nominal independent variable with three or more levels, we could use a(n) ________ to analyze the data. Select one: A. t test B. ANOVA C. z test D. PRE test 2. Interested in the effects of different kinds of instruction on videogame performance, Martin asks 30 college freshmen to each play an hour of Ratchet and Klank. Participants are randomly assigned to one of three instruction groups: (1) complete the...
Question 1 (1 point) When we compute an independent-samples t-test, we are looking to see if...
Question 1 (1 point) When we compute an independent-samples t-test, we are looking to see if there are significant differences between the means of two independent groups, each measured on a different level of the independent variable. al True b) False Question 2 (2 points) When we compute a paired-samples &-test, we are looking to see if there are significant differences between the means of two independent groups, each measured on a different level of the independent variable. a) True...
11. Multiple regression analysis is used when one independent variable is used to predict values of...
11. Multiple regression analysis is used when one independent variable is used to predict values of two or more dependent variables. True or False 13. For a two-tailed null hypothesis, the test statistic Z=1.96. Therefore, the p-value is 0.05. True False
In a study of the effects of cognitive training on memory, 60 participants are recruited, run...
In a study of the effects of cognitive training on memory, 60 participants are recruited, run in a session where they are given a 10-page Wedding story to remember, and then tested. The participants are randomly assigned to one of three conditions: a) 20 subjects participate in a Memory Improvement Training program during the session, b) 20 subjects are given exercises that do not improve memory (i.e., focusing on a white board), but are told that the exercises are meant...
One way to increase the statistical power within a between-groups design is to: have each participant contribute two data points per condition. match participants on a variable of inter...
One way to increase the statistical power within a between-groups design is to: have each participant contribute two data points per condition. match participants on a variable of interest and have similar people participate in a different level of the independent variable. have each participant serve in all conditions of the study. use planned comparisons to analyze the results rather than an F test.
Question 2 1 pts For an independent-measures ANOVA comparing four treatment conditions, dfbetween=3. True False Next For an analysis of variance comparing four treatment means with a separate sample of a participants in each treatment, the F-ratio will have df - 3.31, 8 True False Next →
Question 1 (1 point) When we compute an independent-samples t-test, we are looking to see if there are significant differences between the means of two independent groups, each measured on a different level of the independent variable. al True b) False Question 2 (2 points) When we compute a paired-samples &-test, we are looking to see if there are significant differences between the means of two independent groups, each measured on a different level of the independent variable. a) True...
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