quantitative data management - correlation

Question 1

what is a correlation

Answer 1

variables that relate to eachother.
e.g. hotter weather = more ice cream sales.
postive and negative correlations
e.g. less alcohol = better health

Question 2

pearsons R

Answer 2

plot data, calculate mean of each variable, subtract x from y, calculate axb, asq, bsq, add sum of each, sum of axb/ square route of sum of asq x sum of bsq

Question 3

spurious correlations

Answer 3

no actual relationship.

Question 4

hypothesis driven research

Answer 4

it must be this, we must make predictions in advance to avoid HARKING - hypothesising after results are known

Question 5

correlation does not mean causation

Answer 5

we can’t always be entirely sure.