1. Which statements distinguish biostatistics, descriptive statistics, and statistical inference?
2. A study concerns all births at a district maternity unit, but researchers observe only conveniently available hospital records. Which statements apply?
3. A clinic records blood group, hypertension grade, number of prenatal visits, and measured weight. Which classifications are correct?
What methods does biostatistics use to study health data?
It collects, describes, analyzes, and interprets health data while accounting for variability.
What does descriptive statistics summarize, and what does inference generalize to?
Descriptive statistics summarizes observed data; inference generalizes to a population using probability.
What is a population, and what is each of its elements called?
It is the set studied; each element is a statistical unit, or individual.
How can random sampling affect selection bias?
It limits bias caused by choosing the units.
What are the possible values of a statistical variable called?
Its modalities.
What distinguishes nominal qualitative data from ordinal qualitative data?
Nominal categories have no order; ordinal categories are ordered.
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