Topic 1 - Statistical analysis Flashcards
0
Q
Describe the normal distribution curve
A
68% of all values lie within +-1 STDEV of the mean, 95% within +-2.
0
Q
What is standard deviation?
A
A term used to summarise the spread of values around the mean
1
Q
What are error bars?
A
A graphical representation of the variability of data
2
Q
How is STDEV used to compare the means and the spread of data between two or more samples?
A
A small STDEV indicates that the data is clustered closely around the mean.
A large STDEV indicates a wider spread around the mean.
3
Q
What is range?
A
The difference between the largest and the smallest values of a set
4
Q
What is the t-test used for?
A
Used for comparing two sets of data and measuring the amount of overlap between the sets
5
Q
Is there a relationship between correlation and causation?
A
No
