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
