Normal

Question 1

qnorm()?

Answer 1

Gives −∞ to q

• Gives the value of ‘x’ within that range (ex., 60 months)

Question 2

pnorm()?

Answer 2

• Gives the proportion/percentage/probability of individuals in a certain region of the Normal distribution

Question 3

Z~N(0,1)?

Answer 3

• When used with a q in R code, this z-score will tell you how many SD the data point is from the mean

Question 4

What is a z-score?

Answer 4

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

Question 5

First quartile?

Third quartile?

Answer 5

The first quartile is the first 25% in the distribution

The third quartile is the first 75% in the distribution