#20 part b only- show full work for psych stats 20. Exercise is known to produce positive psychologi-cal effects. Interestingly, not all exercise is equallyeffective. It turns out that exercising in a naturalenvironment (e.g., jogging in the woods) producesbetter psychological outcomes than exercising inurban environments or in homes (Mackay & Neill,2010). Suppose that a sports psychologist is inter-ested in testing whether there is a difference betweenexercise in nature and exercise in the lab with respectto post-exercise anxiety levels. The researcher re-cruits n = 7 participants who exercise in the lab andexercise on a nature trail. The data below representthe anxiety scores that were measured after eachexercise session. ParticipantABCDEFGAnxiety afterExercisingin Lab323 4 5 4 59665248524852Anxiety afterExercisingin Nature8684837443844a. Treat the data as if the scores are from an indepen-dent-measures study using two separate samples,each with n = 7 participants. Compute the pooledvariance, the estimated standard error for the meandifference, and the independent-measures t statistic.Using a = .05, is there a significant differencebetween the two sets of scores?b. Now assume that the data are from a repeated-measures study using the same sample of n = 7participants in both treatment conditions. Computethe variance for the sample of difference scores,the estimated standard error for the mean differ-ence, and the repeated-measures t statistic. Using.05, is there a significant difference betweenthe two sets of scores?α=

In this study, the focus is on investigating the impact of different exercise environments on…

. Now assume that the data are from a repeated- measures study using the same sample of n = 7 participants in both treatment conditions. Compute the variance for the sample of difference scores, the estimated standard error for the mean differ- ence, and the repeated-measures t statistic. Using .05, is there a significant difference between the two sets of scores? =

. Now assume that the data are from a repeated- measures study using the same sample of n = 7 participants in both treatment conditions. Compute the variance for the sample of difference scores, the estimated standard error for the mean differ- ence, and the repeated-measures t statistic. Using .05, is there a significant difference between the two sets of scores? =

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter10: Matrices

Section10.EA: Extended Application Contagion

Problem 2EA

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Exercise is known to produce positive psychological effects. Interestingly, not all exercise is equally effective. It turns out that exercising in a natural environment (e.g., jogging in the woods) produces better psychological outcomes than exercising in urban environments or in homes (Mackay & Neill, 2010). Suppose that a sports psychologist is interested in testing whether there is a difference between exercise in nature and exercise in the lab with respect to post-exercise anxiety levels. The researcher recruits n = 7 participants who exercise in the lab and exercise on a nature trail. The data below represent the anxiety scores that were measured after each exercise session.a. For this repeated-samples design, test the hypothesis that post-exercise anxiety is lower when people exercise in nature than when they exercise indoors (in the lab). Use ? = .05, two-tailed. Make certain to follow the steps shown in the course lecture slides and textbook. Use the computational formula…
Exercise is known to produce positive psychological effects. Interestingly, not all exercise is equally effective. It turns out that exercising in a natural environment (e.g., jogging in the woods) produces better psychological outcomes than exercising in urban environments or in homes (Mackay & Neill, 2010). Suppose that a sports psychologist is interested in testing whether there is a difference between exercise in nature and exercise in the lab with respect to post-exercise anxiety levels. The researcher recruits n=7 participants who exercise in the lab and exercise on a nature trail. The data below represent the anxiety scores that were measured after each exercise session. Treat the data as if the scores are from an independent-measures study using two separate samples, each with n=7 participants. Compute the pooled variance, the estimated standard error for the mean difference, and the independent-measures t statistic. α=0.05, is there a significant difference between the…
Exercise is known to produce positive psychological effects. Interestingly, not all exercise is equally effective. It turns out that exercising in a natural environment (e.g., jogging in the woods) produces better psychological outcomes than exercising in urban environments or in homes (Mackay & Neill, 2010). Suppose that a sports psychologist is interested in testing whether there is a difference between exercise in nature and exercise in the lab with respect to post-exercise anxiety levels. The researcher recruits n 5 7 participants who exercise in the lab and exercise on a nature trail. The data below represent the anxiety scores that were measured after each exercise session. Treat the data as if the scores are from an independent-measures study using two separate samples, each with n 5 7 participants. Compute the pooled variance, the estimated standard error for the mean difference, and the independent-measures t statistic. Using a 5 .05, is there a significant difference…
Ophthalmology The following data are from a study on Botox injections. Patients received a high-dose injection in one eye (experimental treatment = treatment E) and a low-dose injection in the other eye (control treatment = treatment C). Patients were asked to rate the level of pain in each eye on a 1-10 scale, with higher scores indicating more pain. The assignment of treatments to eyes was randomized. The subjects came back over several visits. Data from the last visit are given in the table below. Effect of Botox injection on eye pain Subject 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Pain score at the last visit Pain in E eye Pain in C eye 1.3 7.3 0.0 0.0 3.0 0.0 3.5 0.0 0.0 2.0 0.0 3.0 5.0 0.3 0.0 4.3 USE SALT 8.7 1.4 0.9 9.6 7.9 9.1 5.1 2.2 2.6 7.9 4.4 4.6 9.1 7.4 0.4 0.7 UNİ TANTE ELANIKE Cunnnen win wich to compare the nain score in the E eve vs. the pain score in the C eye.
a. Using the results above, can we consider team popularity as a significant mediator and moderator? Justify your answer. b. Is the assumption of the sports psychologist correct when he claimed years of coaching do not have direct effects to team success? Why or why not? c. In the moderation analysis, what happened to the correlations between years of coaching and team success along different levels of team popularity?
Statistics Question
The researcher performs an analysis of variance (ANOVA) to test the hypothesis that the populations defined by the treatment combinations are equal. The results are presented in the following ANOVA table. Source Between treatments Factor A Factor B AXB interaction Within treatments Total ANOVA Table SS 1,607.1875 37.8120 645.9380 3 923.4400 3 5,127.4975 72 6,734.6875 79 df 7 1 37.8120 0.53 215.3127 3.02 307.8133 4.32 71.2152 MS F Use the significance level a = 0.05 to complete the following conclusions. The critical F value for factor A (years in military) is 3.97. Therefore, the main effect due to factor A is The critical F value for factor B (program component) is 2.73. Therefore, the main effect due to factor B is The critical F value for the interaction of factors A and B is 2.73. Therefore, the effect due to the interaction of factors A and B is
e. The results of which type of observational study are generally more able, retrospective or prospective? A. Prospective studies are more reliable because there are more confounding variables than retrospective studies. OB. Retrospective studies are more reliable because there are fewer confounding variables than prospective studies. OC Retrospective studies are more reliable because there are more confounding variables than prospective studies. OD. Prospective studies are more reliable because there are fewer confounding variables than retrospective studies.
What does an A X B interaction mean in a two - way ANOVA? A. The affect of factor A depends on the level of factor B B. The main effects for Factors A and B must be short of significance C. There must be significant main effects for Factors A and B D. If there are significant main effects, they must be interpreted first before interpreting the interaction
Dr. Guidry conducts a study examining the relationship between the number of friends one has and the experience of daily stress and life satisfaction. She randomly samples 1,500 elderly men and women in Nashville, Tennessee (the state capital), located in the southern United States. Dr. Guidry submits her study for publication in a scientific journal. If one of the peer reviewers is concerned about the external validity of her study, which of the following is the most important aspect of Dr. Guidry's study to consider? the number of significant findings the random sampling technique used to recruit the participants the number of people in the sample the use of three measured variables