Data Basics
One way we gather data
What is surveys?
Define frequency
What is count?
what are intervals on the x-axis (what we count by)?
Symbol to take notes in RStudio
What is a #?
What is the console?
Define Data
What is information that is collected and recorded?
Define typical.
What is the most common occurrence?
Define symmetric.
What's different about the code for a dotplot?
What is a capital P: dotPlot
Graph that uses 2 numerical variables?
What is a scatterplot?
Define variability.
What is how much the data varies (how spread out it is)
typical = always center?
What is no, typical is not necessarily always in the center
Define algorithm.
What is an input with correct syntax that produces the same output every time.
EX: PB&J Sandwich
Two codes that give the same output as dim(cdc)
What is nrow(cdc) and ncol(cdc)
Define syntax. Why is it important?
What is the language used (capitalization, spelling, and punctuation). Codes have to be correct or we will get an error.
Difference between Categorical and Numerical variables
What is words/categories vs numbers only
What is max-min?
Right vs Left Skewed
What is:
Right-skewed: peak on left, tail on right
Left-skewed: pean on right, tail on left
cex vs nint
what is:
cex: changes size of dots
nint: changes # of bins/intervals
Basic coding formula & what each piece is...
What is function(y~x, data=_____)?
Function = type of graph, or what you want R to do (ex: tally)
y & x = variables with tilde in between
data blank = the name of the dataset
What is pose question, consider data, analyze data, interpret data?
Visualization that is better than a tangible plot, why?
What is dotPlot because it is more organized and easier to read/interpret?
Modes (spread of datal)
Hint: There are 3.
Unimodal - one peak
Bimodal - two peaks
Multimodal - more than two peaks
Layout option
what is an option to add to a code that changes the # of columns and rows in a split graph - makes graphs easier to compare (side by side or stacked).
layout = c(#,#) -- 1st # = columns, 2nd # = rows.
Difference between grouping and splitting.
What is inputs:
split = |(after variable), groups = _____(at end of code)
What is outputs:
groups = 1 graph, multiple colors
split = multiple graphs, side by side or stacked