if Group A was only tested in the morning and GroupB was only tested in the afternoon, this would be a good example ofa minor problema directionality problema well-designed experimenta confounding variableexperimental over-controlO an expectancy effect Imagine you are a researcher interested in the effects of marijuana onbeliefs in conspiracy theories. The study involves two groups, to whichpeople are assigned by chance: Group A takes a pill that contains theactive ingredient in cannabis, THC, while Group B are given a harmlessplacebo pill. Neither the people conducting the study nor the participantsknow who is getting the drug and who is not. After taking the pill andcompleting some filler tasks, participants are given a series of surveys tocomplete. One of these theories asks them to indicate the extent towhich they believe in different conspiracy surveys (e.g., a secret group likethe Illuminati controls the world, Obama was not born in the US & issecretly a Muslim, 9/11 was an inside job, the moon landing was faked).

Answered: if Group A was only tested in the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Research Question: Do crows remember the faces of people who bother them? A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows scolded a person in the neutral mask in 109 out of 922 encounters.In order to use the percentile method, you needed to generate a dot plot in StatKey. Which of the following best describes what's going on in this dot plot? Choice 1: StatKey randomly generated many more samples crows, and each dot represents the average number of caveman masks each sample scolded. Choice 2:StatKey randomly generated many more crows, and each dot represented the difference in the number of caveman and neutral masks that each crow scolded. Choice 3:StatKey randomly generated many more crows, and each dot represented the difference in the proportion of caveman and neutral masks that each crow scolded. Choice 4:StatKey randomly generated many more samples of crows, and for each sample, calculated the difference in the proportions…
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Frequency Distribution and Measures of Central Tendency Directions: Answer the following. The data below is a frequency distribution of the Intelligence Quotient (IQ) of 200 students taking up Behavioral Psychology and Business Statistics in a certain university:
Question 4 Forys and Dahlquist (2007) investigated the effects of coping style and cognitive strategy on dealing with pain. Participants were first classified as having a monitoring or avoiding coping style. Participants were then randomly assigned to one of two cognitive strategy conditions, distraction or sensation monitoring. Participants were next instructed to use the cognitive strategy while submerging their hand in ice water. The researchers measured pain tolerance as the number of seconds participants were able to keep their hand in the ice water. How would you label the ANOVA used to analyze this data? 4 x 2 within-groups ANOVA O 2x 2 between-groups ANOVA 2 x 2 within-groups ANOVA 4 x 2 between-groups ANOVA
Section 6.3: Hypothesis Test of Differences in Proportions Example 4. Autism and Maternal Antidepressant Use A recent study41 compared 298 children with Autism Spectrum Disorder to 1507 randomly selected control children without the disorder. Of the children with autism, 20 of the mothers had used antidepressant drugs during the year before pregnancy or the first trimester of pregnancy. Of the control children, 50 of the mothers had used the drugs. (a) Is there a significant association between prenatal exposure to antidepressant medicine and the risk of autism? Test whether the results are significant at the 5% level. (b) Can we conclude that prenatal exposure to antidepressant medicine increases the risk of autism in the child? Why or why not?
Do single-parent families tend to be more impoverished than families with two parents? In order to test if there is a relationship between family structure and family income level, family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. _________________________Family Structure____________________________ Total family Income One Parent Two Parents TOTAL Below poverty level 24 20 44 Not Below Poverty Level 11 45 56 Total 35 65 100 What are the independent and dependent variables.? What is the null hypothesis? What test should we use?…
Hand Computation of this, same with the result of the software excel and jamovi: A psychologist would like to research if the Hope scale(Synder, et al., 1991) scores differ between those living in City A and City B. The 12-item scale consisted of two subscales: a 6-item agency subscale and a 6-item pathways subscales. Scores on the 12 items were averaged, with higher scores indicating higher levels of hope. The following scores were obtained. Use Student’s t-test for Independent Groups, alpha at .05 2 tail City A - 43 38 36 38 52 60 58 66 55 63 City B - 62 34 35 52 58 72 57 55 80 67
Do single-parent families tend to be more impoverished than families with two parents? In order to test if there is a relationship between family structure and family income level, family researcher studied a sample of 35 one-parent and 65 two-parent families in a particular city to determine whether their total family income fell below the poverty level. _________________________Family Structure____________________________ Total family Income One Parent Two Parents TOTAL Below poverty level 24 20 44 Not Below Poverty Level 11 45 56 Total 35 65 100 What are the independent and dependent variables.? What is the null hypothesis? What test should we use?…
Scenario: If 20 participants completed an attention task twice — once after consuming a sugar pill and once after consuming a pill that contained 25 mg nicotine, which test would be most appropriate? Assume data meets all assumptions for a parametric test, and that participant exposure to the sugar pill vs. nicotine pill were counterbalanced. Question: Which of the following best describes the research design? Descriptive Predictive Quasi-experimental Experimental

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if Group A was only tested in the morning and Group B was only tested in the afternoon, this would be a good example of O a minor problem a directionality problem a well-designed experiment a confounding variable experimental over-control an expectancy effect