MATH 120 STATISTICS STUDY GUIDE REVIEW 2026 PRECISE ANSWERS GRADED A.

MATH 120 STATISTICS STUDY GUIDE
REVIEW 2026 PRECISE ANSWERS
GRADED A+

◉ population data. Answer: data collected from all subjects in the
population under study


◉ sample. Answer: a subset of the population


◉ sample size. Answer: the number of individuals in a sample


◉ parameter. Answer: a value of interest computed based on
population data


◉ statistic. Answer: a value of interest computed based on sample
data


◉ variable. Answer: characteristic/ trait that may vary among
subjects


◉ qualitative variable. Answer: nominal &ordinal variables


◉ quantitative variable. Answer: discrete & continuous

, ◉ ordinal. Answer: if there is a clear ordering of the categories;
categorical
ex: size of a pizza


◉ nominal. Answer: if there is NOT a clear ordering of the
categories; categorical
ex: type of fruit


◉ discrete. Answer: if the variables can only take particular values in
an interval; quantitative
ex: goals scored... 1, 2, 3...


◉ continuous. Answer: if the variables can take on any value in any
interval; quantitative
ex: height of penguins... 29.2in, 24 in, etc


◉ range formula. Answer: maximum value - minimum value


◉ median. Answer: value that lies in the middle of the data when
arranged in ascending order


◉ IQR. Answer: the range of the middle 50% of the observations in a
data set