Normal Model

Question 1

The Standard Normal Curve (Z)

Answer 1

mean 0 and SD 1. Short: N(0,1)

Question 2

The General Normal Curve (X)

Answer 2

any mean and SD.
It is denoted by N(mean, SD^2)

Question 3

lower tail area

Answer 3

pnorm( x, lower.tail = T)

Question 4

upper tail area

Answer 4

pnorm( x, lower.tail = F)

Question 5

pnorm

Answer 5

pnorm( x, mean, sd)

Question 6

68%-95%-99.7% Rule

Answer 6

All Normal curves satisfy this rule
* The area 1 SD out from the mean in both directions is 0.68
* The area 2 SDs out from the mean in both directions is 0.95
* The area 3 SDs out from the mean in both directions is 0.997

Question 7

Any General Normal can be rescaled into a Standard Normal.

Answer 7

True

Question 8

The normal curve is symmetric.

Answer 8

True

Question 9

Without reproducible research…

Answer 9

Data versions can change
Graphical summaries can change