math test 1 Flashcards
population
totality of objects being studied
parameter
limit of the population
census
every decade we gather information from the population
sample
a part of the population. a subject of the population being studied
data
represents answers to the research question
variable
whatever you are studying
raw data
numbers to represent answers to the research question
quantiative data
numbers
qualitative data
opininons or non numbers
discrete data
limited answers or limited choices
continuous data
unlimited choices
what are the four types of data
nominal, ordinal, interval, and ratio
what is nominal data
it is the lowest form of data and it goes by name
what is ordinal data
it is rank order
what is interval data
it goes by numbers and each number has the same distance betweeen each number
what is ratio data
zero has a meaning. highest form of data
what is random sampling
everyone has a chance of being chosen
what is sampling error
difference between the mean values of the population and the mean values of the sample
what is simple random sample
a subset of people from a random sample
what is frequency distribution
a way to organize data
histogram
continuous bars, the bars touch continuous data
bar chart
discrete data, bars do not touch
