TEST PAPER QUESTIONS ANSWERS
GRADED A+
◉ Qualitative variables.
Answer: variables that can be placed into distinct categories, according
to some characteristic or attribute
◉ What are the types of qualitative/categorical data?.
Answer: Nominal and ordinal
◉ What are the types of quantitative data?.
Answer: discrete and continuous
◉ What is discrete data?.
Answer: integers. Examples: numbers of hospital days, number of
seizures
◉ What is continuous data?.
Answer: Numbers that can take any value in a range e.g height or weight
◉ nominal variables.
Answer: classified into groups in an unordered manner and with no
indication of relative severity. Examples: race, yes/no, mortality, blood
type
, ◉ ordinal variables.
Answer: Ranked in a specific order but with no consistent level of
magnitude. Example: NYHA class, Agree-disagree
◉ Numerical methods of describing data: measures of central tendenct.
Answer: mean, median, mode
◉ Numerical methods of describing data: measures of data spread or
variability.
Answer: Standard dev, Range, Percentiles
◉ Types of discrete distributions.
Answer: Binomial and Poisson
◉ Binomial Distribution.
Answer: a frequency distribution of the possible number of successful
outcomes in a given number of trials in each of which there is the same
probability of success.
◉ Poisson Distribution.
Answer: Counting events in a certain period of observation
◉ Gaussian Distribution.