The
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A: This is a case of partial correlation.
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A: Null Hypothesis: There is no significant change in LVM over time. Alternative Hypothesis: There is a…
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A: We have to find out answer of given question....
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A: we have to find reliability.
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A: Given information: A researcher wants to test a new memory performance supplement that has shown…
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A: Given: Mean SD Sample size Owns Dog 875 134 22 Does Not owns Dog 800 133 80
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A: It is an important part of statistics. It is widely used.
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Q: True or False) A clinical trial is conducted to compare an experimental medication to placebo to…
A:
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A:
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A: Hypothesis test is conducted to check the difference. To check mean differences we use either Z or T…
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The dose-response effect is best described as
When the value of the response variable changes in a meaningful way with the dosage of the suspected cause
when similar studies produce similar results
when all other possible causes are ruled out
when the suspected precedes the response variable
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- 9. From a psychological knowledge-claim point of view, an analysis of data based on for repeated-measures is noteworthy because the analysis is based on how each and every sampled individual shows variation on the dependent variable (DV) rather than how groups of sampled individuals show variation on the DV . a, true b. false In a study with one sample of individuals measured on the dependent variable (DV) before and after treatment, the average difference between DV scores is found to depart from zero. This suggests the possibility of rejecting the null hypothesis (He: Dbar = 0) true or falseA researcher wants to test a new memory performance supplement that has shown some promise in primate studies where subjects were given the supplement followed by the task of identifying pictures of other animals three days later. The dependent variable was measured by the number of pictures correctly identified. The researchers noticed that while there was a positive correlation between the group given the supplement and number of correctly identified pictures as compared to the control group, they also notice that there seemed to be some variation between the males and females of the primates. Additionally, two different amounts of the drug have been proposed for consideration. Therefore, in the current study, the researchers want to divide the subject primates (N=60) by gender (male: n=30; female: n=30), and give them a 10 mg dose in one treatment condition, and a 25 mg dose in the other treatment condition. To do this, they are dividing each group of males and females in half, and…True or False? A clinical trial is conducted to compare an experimental medication to placebo to reduce the symptoms of asthma. Two hundred participants are enrolled in the study and randomized to receive either the experimental medication or placebo. The primary outcome is self-reported reduction of symptoms. Among 50 participants who receive the experimental medication, 30 report a reduction of symptoms as compared to 15 participants of 50 assigned to the placebo. The 95% CI for the relative risk of participants reporting a reduction of symptoms between the experimental and placebo groups is between 1.529 and 8.012. Please Explain how you come up with the answer of TRUE or False?
- Studies show that the level of anxiety has changed since the pandemic. The average score before the pandemic was mu equal to 36. A sample of 20 individuals surveyed in the past two weeks produced M=37.6 and s=9.8. Based on the sample, was there a significant difference in the average anxiety level since the pandemic started at the 5% significance level? What is the positive critical value? (a)2.093 (b)2.086 (c)1.729 (d)1.725Two separate samples receive two different treatments. The first treatment group (N = 9) has a mean of 50 with SS = 710. The second treatment group (N = 6) has a mean of 60 with SS = 460. Is the second treatment group significantly larger than the first? What is the effect size?Guéguen and Jacob (2012) asked waitresses to wear different colored T-shirts on differentdays for a six-week period and recorded the lips left by male customers. The results show that male customers gave significantly bigger tips to waitresses when they were wearing red. For this study, identify the independent variable and the dependent variable.
- Earlier in this chapter we described a study by Bartholow and Anderson (2002) examining how the experience of violence in video games influenced aggressive behavior for males and females. Their results suggest that increased violence increase aggressive behavior for males but has little or no effect for females. The following data are measures of aggressive behavior similar to the results obtained in the study. Use an ANOVA with α=.05 to evaluate the data. Describe the effect of the violent game compared with a nonviolent game on the aggressive behavior for males and for females. Calculate the effect size (η2) for each main effect and for the interaction.A new screening test for Lyme disease is developed for use in the general population. The sensitivity and specificity of the new test are 60% and 70%, respectively. Five hundred people are screened at a clinic during the first year the new test is implemented. Assume the true prevalence of Lyme disease among clinic attendees is 10%. Calculate the predictive value of a positive test.A researcher is testing the effectiveness of an intervention for patients with type 2 diabetes and depression that focuses on increasing medication adherence compared with usual primary care. Patients randomized to the intervention group were more likely to achieve remission of depression compared with patients in the usual care group at 12 weeks (intervention 58.7% vs usual care 30.7%, p < .001). Based on this information and the information found in table 1, how would you interpret the study findings. Table 1. Baseline Characteristics of Study Population Characteristic Sociodemographic Age, mean (SD) y African American, n (%) White, n (%) Hispanic, n (%) Other, n (%) Years with diabetes, mean (SD) MMSE score, mean (SD) Usual Care (n=88) 57.1 (9.6) 48 (54.5) 36 (40.9) 3 (3.4) 1 (1.1) 12.0 (11.8) 28.2 (2.3) Intervention (n=92) 57.8 (9.4) 54 (58.7) 29 (31.5) 4 (4.3) 5 (5.4) 10.5 (1.2) 28.2 (2:3) P value .63 .30 .02 ,99 4 TRA 1
- A 2019 study surveyed Norwegian parents about their children's eating habits and taste sensitivities. We are interested in seeing if there is a relationship between sensitivity to sweetness and emotional overeating. The study reports an F* = 2.34 with dfb 3 and dfw = 96. How many levels of 'sensitivity to sweetness' were used in the study? How many subjects participated in the entire study?The effectiveness of surgery for weight loss reported here found that "The surgery was associated with significantly greater weight loss [than the control group who dieted] through 2 years (61.3 versus 11.2 pounds, P<0.001)." What test could have been used and how would it have been computed?You wish to test whether a particular drug manages to bring body temperature down. So, you conduct a pilot study where 47 people receive the drug, and 45 people receive a placebo. The body temperatures of patients from the treatment group are group 1 (variable X1); those from the placebo group are group 2 (variable X2). What is the research hypothesis? mu1 > mu2 mu1 ≠ mu2 mu1 < mu2 mu1 = mu2