# Shared Flashcard Set

## Details

Stats: Chapter One
Chapter One of AP Statistics
27
Mathematics
09/15/2009

Term
 statistics
Definition
 science of collecting, analyzing, and drawing conclusions from data
Term
 population
Definition
 entire collection of individuals about which information is desired
Term
 sample
Definition
 section selected from the population for study
Term
 parameter
Definition
 characteristic of a population
Term
 statistic
Definition
 quantity computed from values in a sample
Term
 quantitative data
Definition
 information that can be counted or measured numerically
Term
 qualitative data
Definition
 information that describes the attributes or properties that an object possesses
Term
 discrete data
Definition
 numerical data where the values are isolated points on the number line
Term
 continuous data
Definition
 numerical data where the values form an entire interval on the number line
Term
 self-selected survey
Definition
 survey where those being asked the questions are given the option of answering them or not
Term
 observational study
Definition
 a type of study where individuals are observed or certain outcomes are measured
Term
 experiment
Definition
 a study where the investigator observes how a variable behaves when the researcher manipulates one or more variables
Term
 confounding variable
Definition
 a variable that is both related to group membership and the response variable of interest in a research study
Term
 confounding
Definition
 a variable that is both related to group membership and the response variable of interest in a research study
Term
 random sample
Definition
 sample cosen using a method that ensures that each different possible sample of the desired size has an equal chance of being chosen
Term
 stratified sampling
Definition
 separate random samples are independently chosen from each subgroup (when the population has been separated into subgroups)
Term
 systematic sampling
Definition
 a value k is chosen and the kth person is chosen and every kth individual is chosen (used when the population consists of a list or sequential arrangement)
Term
 cluster sampling
Definition
 dividing the population into non overlapping subgroups and then choosing the clusters at random
Term
 convenience sampling
Definition
 using an easily available or convenient group to form a sample
Term
 single blind study
Definition
 either the person giving the pill know who gets which pill and the person receiving the pill does not know or vice versa
Term
 double blind study
Definition
 neither person knows who is receiving the pill
Term
 nominal level of measurement
Definition
 classifying cases in unordered groups
Term
 ordinal level of measurement
Definition
 classifying cases in ordered groups but the distance between the groups may vary
Term
 interval level of measurement
Definition
 classifying cases in ordered groups but the distance between the groups may vary
Term
 ratio level of measurement
Definition
 groups where there is a natural 0 point
Term
 descriptive statistics
Definition
 made up by methods for organizing and summarizing data
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