6. Randomization is key to a good experimental design. Give2 benefits of randomization?7. How is hypothesis of an experiment formulated? How ishypothesis tested?8. Explain single and double blinding? Give one benefit ofthis experimental design methodology?9. What is the "gold standard' in experimental methodology?Why do you think it's the “gold standard"?10. Why must we minimize error in experiments?

Here's detailed answers: Step 1 : Randomization plays a crucial role in experimental design, and…

Answered: 6. Randomization is key to a good…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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28. Which of the following choices refers to the data between the probability of a positive test result giventhe presence of the disease and the probability of a positive test result given the absence of the disease?A. Negative likelihood ratioB. Negative predictive value C. Positive likelihood ratioD. Positive predictive value 29. Which of the following choices refers to the amount of time that a diagnosis is advanced by screening?A. Lead time biasB. Length bias sampling C. Survival rateD. Survival time 30. A point on a continuum that extends from clearly normal results (for healthy people) to abnormal results (forpeople who have preclinical disease) is called _____.A. Bias indexB. Criterion of positivity C. Predictive valueD. Source of test errors 31. The reliability of a test is the ability to give the same result on repeated testing. Reliability is influenced bywhich of the following?A. All of the optionsB. Interobserver and intraobserver agreement among the analysts conducting the…
6) Specifically in a control group, the variable that is not changed is the blank variable? this is a open ended question and I need help with it
1. Under what circumstances would a researcher choose a longitudinal study over a cross-sectional study? Give a specific example of a question that could be addressed with a longitudinal study. 2. Factorial designs allow researchers to study the effects of more than one independent variable simultaneously. Why is this advantageous? What information can factorial designs yield that non-factorial designs cannot? 3. A nutrition researcher is concerned about mistakenly concluding that a new dietary intervention is effective when it really is not. What type of error is the researcher concerned about making (Type I or Type II)? Describe what the researcher might do to decrease the likelihood of making that type of error. Discuss ramifications of your suggested approach for other types of error in the study. 4. Explain why it is important to interpret the findings of a research project and why these interpretations are an essential element in a high-quality research report.
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3. Chi square tests can be used to support or reject other types of hypotheses where random chance can be involved. For example, studies done on honeybees may track how often bees visit each type of flower. In these studies, you are trying to disprove that the bees visit the flowers in equal amounts (showed no preference). Scientists observed that 54 bees visited tulips and 66 bees visited lilies. Do the bees in the study below show a statistically significant preference for lilies? (Observed - Expected)? Expected Observed Expected Visited Tulips Visited Lilies Summed X = ANALYSIS: 4. In Wisconsin Fast plants, purple stems (P) are dominant to green stems (p). Plants can also be tall (T) or dwarf (t). Two tall plants with purple stems are crossed with results shown in the chart. Do the results support a hypothesis that both plants were heterozygous? Show a chi square analysis to support your position. (Observed - Expected)? Expected Observed Expected Purple, tall 48 Purple, dwarf 16…
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