STA 210 Lecture Notes - Lecture 2: Three Steps, Numeracy
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~ Statistics Lecture #2 ~
Statistical Reasoning Where We Live
o The point of the original chart
was to show the disparity
between Mr. Corbyn’s posts
o Just how great the disparity is
might be masked by the way
the graph is presented.
o Looks like about 1.75
times likes per post
for Corbyn than
Labour Party page
▪ In reality it’s
5210/750 = 6.9 or almost 7 times as many
o To keep the chart small, the visualizer
only labeled a selection of countries
and highlighted those in electric blue.
The OECD average is highlighted in
o All electric blue colors seem
to belong to a different
grouping to the dark blue
▪ This is not the case.
▪ The only thing they
have in common is
that they were
chosen to be
o At first glance, it appears that the weight and neck sized of dogs are perfectly related.
o That is, as weight decreases, looks like neck size decreases at the same rate.
▪ This turns out to be a little deceptive.
o Some Topics in STA 210
o Primarily about how human
behavior affects our ability to
make reliable human
inferences from statistics
▪ Sometimes those
things are just charts,
graphs, and numbers.
▪ Sometimes they are
constructs like tests of
o Other Topics in STA 210
o Concerned with the formal inference process used in:
▪ Constructing confidence intervals and conducting tests of hypothesis
o What is the Truth?
o No way to know