statistics - correct answer ✔collection, analysis, interpretation, and
presentation of numerical data
descriptive statistics - correct answer ✔organizing and summarizing data
population - correct answer ✔collection of persons, things, or objects under
study
sample - correct answer ✔selecting a portion (subset) of the larger
population and study that portion to gain info about the population
statistic - correct answer ✔a number that represents a property of the
sample; estimate of the population parameter or mean
parameter - correct answer ✔numerical characteristics of the whole
population that can be estimated by the statistic
variable - correct answer ✔characteristics or measurement noted by x,y
numerical - correct answer ✔take on values with equal units such as weight
in pounds and time in hours
categorical - correct answer ✔places person or thing in a category
ex: party affiliation (dem, repub, ind. etc)
data - correct answer ✔values of the variable
, datum - correct answer ✔single value
qualitative data - correct answer ✔categorizing/describing attributes of the
population; categorical data (ex: hair color, blood type, ethnic group)
quantitative data - correct answer ✔ALWAYS NUMBERS; results of counting
or measuring attributes of a population
ex: amount of $, weight, # or people
simple random sampling - correct answer ✔any group of n individuals is
equally likely to be chosen, equal chance of being selected; WITHOUT
REPLACEMENT
stratified sampling - correct answer ✔divide population into groups called
strata then take the proportionate # of each strata
cluster sampling - correct answer ✔divide population into clusters (group)
then randomly select from those clusters
systematic sampling - correct answer ✔randomly select a starting point then
take every nth piece of data from the listing population
convenience sampling (non random) - correct answer ✔using the results that
are readily available
sampling bias - correct answer ✔sample is collected from a population and
some members of the population are not as likely to be chosen by others