Flashcards in Initial analysis of the data Deck (48)
What are all R commands?
how do you get data into R
how do you get data out of R
what is nominal data?
names of things
what is ordinal data?
what is interval data?
numeric with no true zero (Celsius)
what is ratio data?
numeric with true zero (kelvin)
which 2 data classifications are categorical or discreet?
nominal and ordinal
which 2 data classifications are continuous variables?
interval and ratio
what is a number?
can have decimals
what is a integer?
what is a character?
not a number
what is a vector?
set of values of the same data (combine function c() )
what is a list?
collection of different vectors or other data structures
what is a factor?
fixed set of values
what are arrays?
n-dimensional homogeneous data types
what are matrices?
2D and numeric
what is a data frame?
a list but all component vectors are same length
what is the R code for viewing the data?
what is the r code for viewing a summary of the data?
what is the r code for computing basic statistics?
What is the r code for the correlation?
what does visualisation give you?
more holistic picture of the data
what are summary statistics?
mean vs median
what is Anscombe's Quartet?
4 sets of data based on standard statistics
what does hist() mean in R?
Plot a histogram
what do missing values suggest?
what is the best first visualisation of 2 variables?
what is a box and whisker plot?
a plot that shows the centre box of the data (50%)