When the incidence rate of a disease in the presence of two or more risk factors...
When the incidence rate of a disease in the presence of two or more risk factors differs from the incidence rate expected to result from individual effects of each factor, this is referred to in epidemiology as: A) Interaction B) Confounding C) Stratification D) Additive
Homework Answers
this is referred to in epidemiology as:
B) Confounding
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When the incidence rate of a disease in the presence of two or
more risk factors...
Epidemiology In a hypothetical study investigating the interaction between factor A and factor B and the...
Epidemiology In a hypothetical study investigating the interaction between factor A and factor B and the risk of disease X; Incidence of disease in the absence of factor A and factor B = 2 per 100,000 population Incidence of disease if factor A is present and factor B absent = 14 per 100,000 population Incidence of disease if factor B is present and factor A absent = 10 per 100,000 population 1. Using the additive model of interaction, what is...
Need some help answering this question!! What are the major factors for cardiovascular disease in the...
Need some help answering this question!! What are the major factors for cardiovascular disease in the US from perspectives of incidence, prevalence and death rate when using figures from the US government sources. What is one example of a modifiable risk factor related to cardiovascular disease, plus one example of a non-modifiable risk factor related to cardiovascular disease??
Epidemiology help! (7). Factors A, B, or C can each individually cause a certain disease without...
Epidemiology help!
(7). Factors A, B, or C can each individually cause a certain disease without the other two factors, but only when followed by exposure to factor X. Exposure to factor X alone is not followed by the disease, but the disease never occurs in the absence of factor X. (3 points) (1) In this case Factor X is (a) Necessary and Sufficient (b) Necessary, but not Sufficient (c) Sufficient but not necessary above (d) Neither Necessary nor sufficient...
478: There is strong interaction between two variables. This means that: A. An interaction occurs when...
478: There is strong interaction between two variables. This means that: A. An interaction occurs when the effect of one input factor on the output depends upon the level of another input factor B. An interaction occurs when there is a strong correlation between two factors C. An interaction occurs when the effect of one input factor on the output depends upon the level of the same input factor D. An interaction occurs when two or more factors are confounded...
Lesson: -Factorial designs have more than one independent variable or factors. -A two way factorial design...
Lesson: -Factorial designs have more than one independent variable or factors. -A two way factorial design has two independent variables, a three-way factorial design has three independent variables and so forth. -A 2x2 design has two factors and two levels of each. -A 2x3 design also has two factors but one has two levels and one has three. -A 3x3 design has two factors and each factor has 3 levels. Each example has 2 independent variables or factors. Comparison of...
1. A group of individuals were classified according to two factors: presence or absence of a...
1. A group of individuals were classified according to two factors: presence or absence of a disease and presence or absence of a set of symptoms. Disease Symptoms Yes No Yes 25 125 No 5 15 An individual is randomly selected from the group. Given that the disease is present, what is the probability that the symptoms are present? Select one: a. 0.83 b. 0.70 c. 0.88 d. 0.75 2. A corporation receives a particular part in shipments of 100....
2. Suppose there are two independent risk factors governing securities returns according to the two factor...
2. Suppose there are two independent risk factors governing securities returns according to the two factor APT. The risk-free rate is 10%. The following well-diversified portfolios exist: beta with respect beta with respect Expected Return to factor 1 to factor 2 Portfolio #1 25% Portfolio #2 25% (a) What are the expected returns on each of the two risk factors in this economy? (b) Suppose another portfolio has a beta with respect to the first factor of 1, a beta...
Consider a three-factor APT model. The factors and associated risk premiums are: Risk Premium (%) Factor Change in gros...
Consider a three-factor APT model. The factors and associated risk premiums are: Risk Premium (%) Factor Change in gross national product (GNP) Change in energy prices Change in long-term interest rates +6.4 0.6 +2.8 Calculate expected rates of return on the following stocks. The risk-free interest rate is 6.5% a. A stock whose return is uncorrelated with all three factors. (Enter your answer as a percent rounded to 1 decimal place.) b. A stock with average exposure to each factor...
Suppose that there are two independent economic factors, F1 and F2. The risk-free rate is 5%, and...
Suppose that there are two independent economic factors,
F1 and F2. The risk-free
rate is 5%, and all stocks have independent firm-specific
components with a standard deviation of 44%. Portfolios A
and B are both well-diversified with the following
properties:
Suppose that there are two independent economic factors, F1 and F2. The risk-free rate is 5%, and all stocks have independent firm- specific components with a standard deviation of 44%. Portfolios A and B are both well-diversified with the following...
Suppose that there are two independent economic factors, F1 and F2. The risk-free rate is 3%,...
Suppose that there are two independent
economic factors, F1 and F2. The risk-free rate is 3%, and all
stocks have independent firm-specific components with a standard
deviation of 52%. Portfolios A and B are both well-diversified with
the following properties: Portfolio Beta on F1 Beta on F2 Expected
Return A 1.4 1.8 30 % B 2.4 –0.18 27 % What is the expected
return-beta relationship in this economy? Calculate the risk-free
rate, rf, and the factor risk premiums, RP1 and...
Epidemiology help!
(7). Factors A, B, or C can each individually cause a certain disease without the other two factors, but only when followed by exposure to factor X. Exposure to factor X alone is not followed by the disease, but the disease never occurs in the absence of factor X. (3 points) (1) In this case Factor X is (a) Necessary and Sufficient (b) Necessary, but not Sufficient (c) Sufficient but not necessary above (d) Neither Necessary nor sufficient...
2. Suppose there are two independent risk factors governing securities returns according to the two factor APT. The risk-free rate is 10%. The following well-diversified portfolios exist: beta with respect beta with respect Expected Return to factor 1 to factor 2 Portfolio #1 25% Portfolio #2 25% (a) What are the expected returns on each of the two risk factors in this economy? (b) Suppose another portfolio has a beta with respect to the first factor of 1, a beta...
Consider a three-factor APT model. The factors and associated risk premiums are: Risk Premium (%) Factor Change in gross national product (GNP) Change in energy prices Change in long-term interest rates +6.4 0.6 +2.8 Calculate expected rates of return on the following stocks. The risk-free interest rate is 6.5% a. A stock whose return is uncorrelated with all three factors. (Enter your answer as a percent rounded to 1 decimal place.) b. A stock with average exposure to each factor...
Suppose that there are two independent economic factors,
F1 and F2. The risk-free
rate is 5%, and all stocks have independent firm-specific
components with a standard deviation of 44%. Portfolios A
and B are both well-diversified with the following
properties:
Suppose that there are two independent economic factors, F1 and F2. The risk-free rate is 5%, and all stocks have independent firm- specific components with a standard deviation of 44%. Portfolios A and B are both well-diversified with the following...
Suppose that there are two independent
economic factors, F1 and F2. The risk-free rate is 3%, and all
stocks have independent firm-specific components with a standard
deviation of 52%. Portfolios A and B are both well-diversified with
the following properties: Portfolio Beta on F1 Beta on F2 Expected
Return A 1.4 1.8 30 % B 2.4 –0.18 27 % What is the expected
return-beta relationship in this economy? Calculate the risk-free
rate, rf, and the factor risk premiums, RP1 and...
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