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Biostatistics Final Exam questions with 100% correct answers
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Biostatistics Final Exam questions with 100% correct answers
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Biostatistics Final Exam questions with100% correct answers
What is biostatistics? - correct answer ✔✔Discipline concerned with the treatment and analysis of
numerical data derived from biological, biomedical, and health-related studies.
What is measurement? - correct answer ✔✔How we get our data... the assignment of numbers of codes
according to prior set-rules
What are the three disciplines of biostatistics? - correct answer ✔✔1. Improve intellectual content of
data.
2. Organize data into a format that is understandable.
3. Relies on tests of experience as standard of validity.
What is an observation? example? - correct answer ✔✔The unit upon which a measurement is made.
ex: a person or a region.
What is a variable? - correct answer ✔✔A characteristic being measured.
What is a value? - correct answer ✔✔A number or code that has been realized
How do you set up a data table? - correct answer ✔✔Observations in rows
Variables in columns
Values in the middle
When would you use a categorical scale? Example? - correct answer ✔✔When there are two or more
categories with no intrinsic ordering to the categories. Example - gender, blood type, disease state.
, When would you use an ordinal scale? Example? - correct answer ✔✔it puts observations into
categories that can be ranked/ordered. Ex: cancer stages.
When would you use a quantitative scale? Example? - correct answer ✔✔For numeric values. Ex: height,
weight, age.
What is objectivity? - correct answer ✔✔The intent to measure things as they are without shaping them
to conform to a preconceived worldview.
What are the two forms of measurement errors? - correct answer ✔✔1. Imprecision
2. Bias
What is imprecision? - correct answer ✔✔The Inability to get the same result on repeat.
What is reliability? - correct answer ✔✔Ability to replicate.
What is bias? - correct answer ✔✔The tendency to overestimate or underestimate the true value.
What is validity? - correct answer ✔✔The ability to identify the true nature of observation... when
something is unbiased
What are two types of studies? - correct answer ✔✔Survey
Comparative (experimental and non experimental)
What kind of sample entails equal chance in selection for generalization to the population? - correct
answer ✔✔Simple random sample.
What are three cautions you must have when picking a sample? - correct answer ✔✔Undercoverage
Volunteer bias
Non response bias
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