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Statistics 1
terms for quiz 1-1,2,3
40
Mathematics
12th Grade
09/13/2011

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Term
statistics
Definition
the science of collecting, organizing, summarizing, and analyzing info in order to draw conclusions
Term
process of stats (4)
Definition
identify objective, collect needed info, organize & summarize info, draw conclusions from info
Term
population
Definition
the group
Term
individual
Definition
member of the group
Term
sample
Definition
subset of the population that correctly represents the population
Term
descriptive stats
Definition
# that describe data of sample (charts, graphs, measurements)
Term
inferential stats
Definition
measure reliability
Term
experimental group
Definition
gets the treatment
Term
control group
Definition
gets the placebo
Term
double blind
Definition
the group & interviewer do not know who has a placebo
Term
variables
Definition
characteristics of the individual within the population
Term
qualitative
Definition
can't be measured in # (description)
Term
quantitative
Definition
can be measured in numbers (countable)
Term
2 kinds of quantitative
Definition
discrete and continuous
Term
discrete
Definition
finite # of possible values, countable
Term
continuous
Definition
infinite # of possible values, not countable, anything on a scale
Term
data
Definition
list of observations, possibilities a variable can assume
Term
data can be obtained from these 4 sources...
Definition
the census, existing sources, survey sampling, designed experiment
Term
census
Definition
list of all individuals in a population along with characteristics of the individuals
Term
existing sources
Definition
previous studies
Term
survey sampling
Definition
ask a question with no attempt to influence the answer
Term
designed experiment
Definition
apply a treatment and study the results
Term
response variable
Definition
what is getting the treatment
Term
lurking variables
Definition
characteristics that may be related but have not been identified
Term
characteristics of an observational study
Definition
ask questions, no control, no influence
Term
characteristics of an experiment
Definition
treatment, have control, do influence
Term
methods of sampling
Definition
random, stratified, systematic, cluster, convenience, multistage
Term
random sampling
Definition
every possible individual has an equally likely chance of getting chosen
Term
frame
Definition
list of all the individuals in a population
Term
stratified
Definition
separate population into non-overlapping groups and take a random sample from each group
Term
systematic
Definition
selecting every kth individual from the population
Term
N
Definition
population size
Term
n
Definition
sample size
Term
N/n
Definition
k (always round down)
Term
p
Definition
randomly selected # between 1 & k (this is your starting #)
Term
how to find the xth person..
Definition
p + k (x-1) = # person
Term
cluster
Definition
selecting all individuals within a randomly selected group
Term
convenience
Definition
bad! using individuals that are easily obtained & self selected
Term
multistage sampling
Definition
using more than one method
Term
sampling without replacement
Definition
you cannot use the same # twice
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