HLTH 501 Biostatistics Final review with correct solutions

Which of the following types of graphics would be most useful in
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demonstrating the frequency of a given outcome as it relates to an ordinal
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variable? - correct answer ✔histogram
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57694122
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According to the data, which measure, is a better measure of dispersion? -
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correct answer ✔standard deviation
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Misclassification bias often occurs in case-control studies. - correct answer | | | | | | | | |



✔True
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The incidence rate of X disease in patients receiving the new medication is
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calculated by: - correct answer ✔patients who are receiving the new
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medication and have X disease / total follow-up (years) of the patients who are
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receiving the new medication ( times (x) 1000 to make a whole number if
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necessary) (a/b if set up in correct way)
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A design that is a very detailed report of the specific features of a particular
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participant or case is known as? - correct answer ✔case report
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The Cumulative incidence is computed as the number of persons who develop a
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disease during a specified period over the number of persons examined at
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baseline - correct answer ✔false
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, 1,000 people are enrolled in a 10-year cohort study. At the start of the study,
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100 have diagnosed CVD. Over the course of the study, 80 people who were
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free of CVD at baseline develop CVD. What is the cumulative incidence at 10
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years? - correct answer ✔0.089 = 80/900: the number of new events or cases
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of disease divided by the total number of individuals in the population at risk
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for a specific time interval.
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Biostatistics is integral to the field of epidemiology, which is defined as study of
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health and illness in human populations, patterns of health or disease, and the
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factors that influence these patterns. - correct answer ✔True
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The best numerical summaries for dichotomous, ordinal, and categorical
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variables are relative frequencies. - correct answer ✔true
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Incidence of disease is the proportion of individuals with the condition
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|(disease) at a single point in time - correct answer ✔false
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The following data were collected as part of a study of coffee consumption
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among graduate students. The following reflect cups per day consumed: 3, 4, 6,
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8 ,2, 1, 0, and 2. The standard deviation is approximately 4. - correct answer
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✔false: use excel to find stdev().
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Assume a new measure of Intelligence Quotient (or IQ) has been developed.
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The mean IQ for the population is 100 and the standard deviation is 15. The
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standard deviation indicates the average distance an individual data value is
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from the mean is about 15 IQ points. - correct answer ✔true
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