Large numbers of microbes: (Select all that apply) a. contribute to population variability b. create statistical reliability c. contribute to population consistency d. give the same results in studies as smaller populations
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Large numbers of microbes: (Select all that apply)
a. contribute to population variability
b. create statistical reliability
c. contribute to population consistency
d. give the same results in studies as smaller populations
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- Cross-sectional surveys measure:A. The prevalence of various demographic characteristics in a well-defined populationB. The exposure histories of a well-defined populationC. The disease states in a well-defined populationD. All the aboveThe following characteristics describe a cross-sectional study: A. The outcome is at the individual-level B. The exposure is at the group-level C. The outcome is at the neighborhood level D. People are recruited into the study based on disease status or having a condition. E.This study design is particularly susceptible to the ecologic fallacySampling fraction is the Ratio between .19 sample size and population size it is better : to be more than a. 10% b. 3% O c. 2% O d. 4%
- A population is correctly defined as having which of the following characteristics? I. Inhabiting the same general area II. Belonging to the same species III. Possessing a constant and uniform density and dispersion III. Possessing a constant and uniform density and dispersion Only I Only I and II Only Il and III Only III I, II, and IIIIn a cohort study, the ratio of the incidence rate of a disease in an exposed group to the incidence rate of the disease in a nonexposed group is the: a. Relative risk b. Risk difference c. Prevalence ratio d. Odds ratioExplain the following sampling techniques that are used in selecting sample elements out of a population in research. Snowball sampling Stratified sampling
- Please answer ASAP 12. Which of the following statement is false regarding a cross-sectional study? a. Prevalence of a variable can be estimated.b. It cannot determine causality between the exposure and the outcome.c. There may be a comparison group in the design of the study.d. Relative risk can be calculated as a measure of association.e. One of its advantages is there cannot be any lost to follow-upWhich of the following is best at showing the life expectancy of an individual within a population? a. quadrat b. mark and recapture c. survivorship curve d. life tableA screening test on a sample of participants had the following results:80 sick people and 10 healthy people were tested positive. 60 sick people and 100 healthy people were tested negative. Suppose that the prevalence of disease in the community is 20%.Calculate the specificity of this test. 52% O 90.9% O 44.4% O 47.6%
- based on the data you reviewed in the AHQR Disparities report, briefly discuss one of the health disparities and what factors you believe contributed to this disparity be specific about population you are referring toFor a particular disease or health condition of interest in a specific population, which of the following can be expected to have the smallest numerator? a. Lifetime prevalence of the disease or health condition in this population on Sep 01, 2022 b. Period prevalence of the disease or health condition in this population since Jan 01, 2022 through Sep 01, 2022 c. Point prevalence of the disease or health condition in this population on Sep 01, 2022 d. More information will be needed to answer thisWhich of the following statements is true about measures of mortality/death? a. The crude mortality rate is a type of incidence rate b. Death certificates data are generally valid c. The case-fatality rate is calculated based on the entire population at risk d. All of the above e. None of the above