Question

Question: Suppose that a study of children who were 9 to 14-years-old found that the larger a shoe size that a child has, the higher the score they got on a mathematical skills test. One interpretation might be that increased shoe size causes improved quantification skills. What might be a confounding variable in this relationship?

Question: A key task for investigating a communicable disease outbreak is characterizing the distribution of the disease. Please describe two key benefits of gathering this type of information.

Question: Please select three predictors of cardiovascular disease and explain how they increase the likelihood of developing the disease

If a virus developed a mutation so that it became much less likely to kill people who were infected, what do you think this would do to the prevalence, incidence, and mortality of the viral infection? You can assume that every other characteristic of the virus stays the same, including the length of infection and how infectious the virus is. And explain why you believe something will happen to each of the three disease measures

Answer 1

●A confounding variable is one that can alter or change the effect of other variables in a research study like the independent and dependent variable Here the confounding variable is the size of the shoe .If the concept of size is changed then the independent variable and the dependent variable will change.

● The key benefits of gathering the information by the characterization are

• It can enable to identify the type of distribution of the infection, its intensity, duration, frequency,previous history.
• The preventive techniques can be planned and initiated

●The three predictors for cardiovascular diseases

• Medical conditions:The disease condition like hypertension, hyperlipidemia, diabetes are strong strong predictors for cardiovascular disease because if this is not under control the risk for getting the cardiovascular disease will also be very high
• Lifestyle:When one has a poor quality of life like zero excercises, uncontrolled diet, smoking ,alcohol, stress this can risk one for getting cardiovascular diseases
• Genetic:Certain condition which are hereditary and passes generation after generations can be a predictor for cardiovascular diseases

When a virus is changes its nature after mutation without any greater impact on the mortality, morbidity, frequency and prevalence, etc., Though it doesn't cause any death the infection remains the same and so the disease condition and its manifestations.

In simple there will be a greater changes in incidence, prevalence and the outcome of the disease.