# STA 2210 WEEK 2 VOCAB

Studied by 32 People
0.0(0)
Get a hint
hint

Statistics

1/33

Tags & Description

## Studying Progress

New cards
33
Still learning
0
Almost done
0
Mastered
0
33 Terms
New cards

Statistics

science of analyzing and gathering data

New cards
New cards

individual data

people or things that are being studied

New cards
New cards

Variable data

characteristics or values being studied

New cards
New cards

What are ways to gather data

by counting, measuring, asking questions, surveys, or general observations

New cards
New cards

Examples of variables

New cards
New cards

Examples of individuals

Names of ppl surveyed

New cards
New cards

categorical variable

labels or descriptions ex: major or grades

New cards
New cards

numerical variable

numerical measurements ex: points

New cards
New cards

How do you summarize categorical variables?

By using a proportion percent

New cards
New cards

How do you summarize numerical variables

by using the mean/average

New cards
New cards

continuous variables

variables that can take on any value in a given data set

New cards
New cards

discrete variables

variables that can only take on a particular value in a data set

New cards
New cards

Which describes a discrete variable

a

New cards
New cards

Which describes a continuous variable

b

New cards
New cards

Population

All individuals as a group

New cards
New cards

Sample

smaller group of individuals; a subset of a population

New cards
New cards

census

getting data from every individual in a population

New cards
New cards

Parameter

numeric summary that comes from population population --> parameter

New cards
New cards

Statistic

numeric summary that comes from a sample sample--> statistic

New cards
New cards

Types of Samples

Representative sample, Random sample, Convenience sample

New cards
New cards

Representative sample

same relevant characteristics as population, not favorable of one group over another

New cards
New cards

random sample

a sample in which every element in the population has an equal chance of being selected

a random sample is a form of a representative sample

New cards
New cards

convenience sample

sample where individuals are chosen because they are easy to observe

New cards
New cards

biased statistical study

design or execution that will favor certain outcomes over others

New cards
New cards

selection bias

sample method chosen leads to unrepresentable samples of population

New cards
New cards

What are the two types of statistical studies?

Observational studies and experiments

New cards
New cards

Observational study

observing or surveying individuals

New cards
New cards

Experiment

an attempt to influence or change individuals

New cards
New cards

Subjects

individuals or things we are receiving data from

New cards
New cards

Explanatory variable (Treatment)

(Independent) variable in the experiment that researchers change, affect, or influence

New cards
New cards

Response Variable

(Dependent) variable in experiment that is expected to respond to the explanatory variable

New cards
New cards

Extraneous variables

Variables other than explanatory or response variables that may affect the outcome or response variable Ex: time, temperature, schedules, etc.

New cards
New cards

confounding variable

an extraneous variable that does affect the outcome of the experiment/response variable

New cards