Year 2 stats Flashcards
1
Q
What is the Product Moment Correlation Coefficient (PMCC)?
A
The strength of linear correlation between two variables
2
Q
What is notable abut the symmetrical nature of normal distribution?
A
mean=median=mode
3
Q
Normal distribution has a (..) curve
A
bell-shaped
4
Q
2
Where are the points of inflection on a normal distribution curve?
A
μ + σ
μ - σ
5
Q
(…) lies within 3 sd of the mean
A
99.7%
6
Q
2
Under what circumstances can a BD be approximated by ND?
A
- if n is large (generally n>50)
- if p is close to 0.5
7
Q
What do you need to apply when using a ND to BD approximation when calculating probabilities?
A
A continuity correction
