STATS quiz 1

population

All - the entire group of interest

sample

portion of population

parameters

numerical summary that describes a characteristic of a population

measurement bias

measurement errors

voluntary sampling

people with strong feelings one way or the other are the ones tending to respond

convenience sampling

only a “convenient” group is surveyed which leaves out many subgroups

survivorship bias

focusing on those who made it past some process and not considering those who did not

Simple Random sample (SRS)

all possible participants are equally likely to be chosen

sampling frame

the set of numerical label’s given to set population

random number generator

used to select desired number of labels from sampling

stratified sampling

a sample of one from each individual group subgroup

cluster sampling

choosing to choose a whole sub group instead of one from every cluster

systematic sampling

every blank subject is sampled

quantitative variables

numerical measurements that records “quantity” - Numbers

categorical variables

categories like habitat season sport.

mode

the most repeated number of the group

variability

diversity