HW2 CH1 - Types of Data, Graphs and Frequency Tables Flashcards
Define the distribution of variable
A variable tells us what values it take and how often it takes these values
Define Histogram
graphical display of quantitative distributions
Define Variable
Define Categorical Variable
Define numeric variable
Define Discrete variable
Quantitative variables that can take only a limited number of values (whole numbers)
Define continuous variable
quantitative variable that take any real numerical value over an interval (decimals)
what is an outlier?
an individual value that falls outside the overall pattern of the histogram
what does skewed to the right mean on a histogram?
The tail goes to the right (the smaller bars on the right side)
When to use time plots?
variable that is measured over time where our main interest is the change over time, where we can see the cycles
What is a cycle?
representing regular ups and downs in the graph
Define Nominal Variable
A categorical variable that is purely qualitative and unordered (flower color)
It is best to plot the data for large data sets using….
a histogram
It is best to plot the data for small sets using….
Dotplots
what is raw data
shows each one of the values in the data set
what is a frequency histogram?
a histogram that displays frequencies
what is what is relative frequency histograms?
bar graph that displays relative frequencies
what is distribution of data set
table, graph, or formula that provides all values in the data set and how often they occur
