Normal Flashcards
1
Q
qnorm()?
A
Gives −∞ to q
- Gives the value of ‘x’ within that range (ex., 60 months)
2
Q
pnorm()?
A
- Gives the proportion/percentage/probability of individuals in a certain region of the Normal distribution
3
Q
Z~N(0,1)?
A
- When used with a q in R code, this z-score will tell you how many SD the data point is from the mean
4
Q
What is a z-score?
A
A Z-score is a numerical measurement used in statistics of a value’s relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean
If a Z-score is 0, it indicates that the data point’s score is identical to the mean score
- If the source is normal, the Z scores will also be normal
5
Q
First quartile?
Third quartile?
A
The first quartile is the first 25% in the distribution
The third quartile is the first 75% in the distribution