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1. A study examining if administering a medication A and participating in regular aerobic exercise is associated with improvements in patient anxiety post myocardial infarction. In the final regression model the R square value is 0.27. U know this means:
A. Exercise and administering medication A improves anxiety seen post myocardial infarctionB. Exercise and administering medication A does not improve anxiety seen post myocardial infarctionC. Exercise and administering medication A explain 27% of the variance seen in anxiety post myocardial infarction.D. Exercise significantly improves anxiety seen post myocardial infarction 27% of the time. 2. When studying the relationship between ankle-brachial blood pressure index and peripheral vascular disease the researchers have a significant R square. They then add a second independent variable of a pain scale. The R square in the model that includes both
independent variables is significant but the R square change is not. You know this means:
A. Having both variables in the model explains significantly more variation in peripheral vascular disease.B. The second variable added may not be significant and should be examined furtherC. Because the model is significant both variables should be includedD. The R square change only matters with the first variable 3. In regression model, to determine the expected impact a change in the indecent variable will have in the value of the dependent variable in a regression model the value to report is:A. The beta coefficientB.the p valueC. The constantD. The constant plus the error term 4. If researchers add independent variables to a regression model which are significant the effect on the R square value wifi be:A. To increase itB. To decrease itC. There will be no changeD. unable to determine 5. If a researcher adds independent variables to a regression model that are not significant you will be able to determine this by looking at:A. R square for the modelB. Unstandardized coefficient for the variableC. Standardized coefficient for the variableD. P value for the variable 6. A negative beta coefficient tells you that when there is a one unit change in the corresponding variable the dependent variable:A. Does not changeB. IncreasesC. DecreasesD. Unable to determine 7. If a study examining gulf war syndrome reports a significant odds ratio of 4.5 associated with exposure to depleted uranium in returning veterans you know this means:A. Veterans who were exposed to depleted uranium are more likely to have gulf war syndrome than those who were notB. The chance of getting sick after an exposure to depleted uranium is 4.5%C. Veterans who were not exposed to depleted uranium are 95.5% more likely to be healthy compared to those who were exposedD. There is a significant association between being a veteran and being exposed to depleted uranium 8. A researcher should use what regression technique to examine the relationship between death before age five and the presence of phenylketonuria, low birth weight and prematurity.A linear regressionB. Multiple regressionC. Logistic regressionD. Standard error of the estimate 9. A research team had difficulty with loss to follow up during their current study. This lead to a sample size of 56 rather than the anticipated sample size of 578 they wanted. They still have found significant results but the small sample size and significant number of independent variables would support reporting which result:A. Standardized beta collectionB. Adjusted R squareC. R squareD. Odds ratio 10. A researcher wishes to use logistic regression to examine the relationship between pressure ulcers and Braden scale score, immune function status, and repositioning schedule. Which example of a measure of pressure ulcers would be an appropriate for this technique?A. Stage l, stage ll, stage ll, stage Lviv levels of full thickness tissue lossB. Swab, fluid aspiration and tissue biopsy sampleC. Length and depth measurementD. Present or not present
Design an enrichment culture medium and a protocol for the isolation and purification of a soil bacterium (e.g., Bacillus subtilis) from a sample of soil. Note possible contaminants and competitors. How will you adjust conditions of growth, and wh..
Discuss how these drugs act on the receptors to prevent the typical symptoms of allergic rhinitis.
If a cumulative frequency distribution were constructed for the weights of the salmon, what would be the cumulative frequency for the class weighing less than 200 grams
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If the primers for amplifying the dpy-5 gene flank (bind toeither side of) the 1009-bp deletion segment, which will produce abigger PCR product: the wild-type or the mutated dpy-5 allele?
Blood glucose was monitored weekly for all mice. After five weeks, there was no change in average body weight between groups.
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In the embryonic phase of development, do the axial and appendicular skeletons begin to form at the same time? Plz help and I do rate faithfully!
Why are free fatty acids not found in high amounts in a membrane?
This one requires that you think about what limits the respiration rates in states IV, III, and in uncoupled mitochondria. Which of the following situations should produce the fastest rate of respiration? Let the substrate be the same in each case..
The first paragraph should describe, including numerical information, the standard of living in your chosen undeveloped or developing country. Compare it to equivalent values in the US.
Think about the meaning of the term ecology How do the ideas of energy and chemical cycles, community structure, biodiversity and succession fit together to form basis of the way natural world works?
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