presenting data Flashcards
what do lab based experiments involve
series of repeating trials
what happens when you group up trials of different types
form different blocks
how do you avoid trial prediction
randomisation of trial order
why do we use graphical representations of data
before analyses to find outliers, skews, detect faults in experiments
view patterns and distributions in raw data
how can you present the data of one variable
frequency plots of bar graphs, pie charts, stem and leaf
box and whisker plots
how can you present the relationship between 2 variables
bar graphs
line graphs
scatterplots
how can you present multifactorial data
bar graphs
line graphs
what graphs can you use for nominal data
bar
frequency table
pie
what does a histogram do
shows shape of continuous data as move up scale from one category/value to next in order.
where does frequency go on a histogram
y axis
what do histograms do with data in the tables
pool data into bins
what else can you plot from the bins of histograms
cumulative frequency
what 5 things can you see on a box and whisker plot
median IQR/spread outliers adjacent values skew/symmetry
what is a fence
cutoff for outliers
what are adjacent values
most extreme values within fences
where are outliers located on a box and whisker plot
outside the fences
what is univariate data
data coming from a single variable; data plotted represent distribution along that variable or for categories of that variable
what is bivariate data
how one variable changes in relation to another; how DV changes in response to IV
how do bar graphs work for bivariate data
DV on y axis
IV on x axis
what do scatterplots do and how do they work
illustrate relationship btwn 2 continuous variables
outcome on y axis
predictor on x axis
what is multifactorial data
changes on both axis
