Answers 2024/2025
population - ANSWERSa group of phenomena that have something in common
sample - ANSWERSa subset of the population
parameter - ANSWERSa characteristic of a population
statisitc - ANSWERSa characteristic of a sample
simple random sample - ANSWERSevery observation in the population has an equal chance of being
selected into the sample
stratified random sample - ANSWERSrandom sampling from known subgroups to ensure adequate
representation in the sample
cluster sampling - ANSWERSrandom sampling only from specified groupings
convenience sampling - ANSWERSmethod of collecting data from convenient, easy-to-access data points
nonresponse bias - ANSWERSbias introduced to a sample when a large fraction of those sampled fails to
respond
selection bias - ANSWERSwhen an analyst purposefully selects portions of a population likely to provide
favorable data
confirmation bias - ANSWERSwhen an analyst only presents data that confirms their existing belief