Statistics 110 Exam 1

Statistics 110 Exam 1

statistics - ANS-uses data to gain insight and draw conclusions

anecdote - ANS-a striking story that sticks in our minds

data - ANS-a collection of information

individuals - ANS-object described by a dataset

variable - ANS-any characteristic of an individual

observational studies - ANS-used to observe individuals and measure variables of
interest but do not attempt to influence the responses

population - ANS-entire group of individuals about which we want information

sample - ANS-a part of the population from which we actually collect information, used
to draw conclusions about the whole

sample surveys - ANS-a type of observational study that surveys a group of individuals
by studying only some of its members

census - ANS-a sample survey that attempts to include the entire population as the
sample

experiment - ANS-deliberately imposes some treatment on individuals in order to
observe their responses

simple random sample - ANS-of size n: every possible set of n individuals from the
population chosen in such a way that every set of n individuals has an equal chance to
be the sample actually selected

voluntary response sample - ANS-lets people volunteer to respond convenience