Which measure of central tendency is least bistable for normally distributed data?
The mean.
Which measure of central tendency is least bistable for non-normally distributed data?
The median.
What does a probability distribution allow that a frequency one does not?
Comparisons irrespective of sample size.
Give 2 advantages of frequency plots.
They display all data points making no assumptions and they show potential outliers/odd ball values in context.
Give 2 disadvantages of frequency plots.
Not very good as summaries and often have so many distributions that comparisons are difficult.
Give 3 advantages of box plots.
They make very few assumptions, highlight potential outliers/odd ball values and facilitate comparisons between conditions.
Give 2 disadvantages of box plots.
Plotting outliers can lead to a cluttered figure and a focus on them rather than the overall pattern of results.
Give a formal definition of statistics.
A function of a sample where the function itself does not depend on the sample.”
Briefly describe the Bayesian approach.
Uses subjective probability and asks about the likelihood of a view given the data.
Briefly describe the frequentist approach.
Uses objective probability and asks about the likelihood of the data given a view of how the world works.
How do we decide to reject a hypothesis, when any result is possible, but some are very unlikely?
Make an a priori decision as to what results are too unlikely.
