Description Usage Arguments Value Examples
recover mean and variance of the data with ceiling/floor effects
1 | rec.mean.var(y)
|
y |
a (non-empty) numeric vector of data with ceiling/floor effects |
ceiling.percentage |
the percentage of ceiling values in the data |
floor.percentage |
the percentage of floor values in the data |
est.mean |
estimated mean of the true scores |
est.var |
estimated variance of the true scores |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | # simulate normally distributed true scores
x=rnorm(1000,2,4)
mean(x); var(x)
# induce 20% floor effects
# and estimate the true mean variance from the floor data
x.f=induce.cfe(.2,0,x)
rec.mean.var(x.f)
# induce 20% ceiling effects
# and estimate the true mean and variance from the ceiling data
x.c=induce.cfe(0,.2,x)
rec.mean.var(x.c)
# induce 20% and 10% of floor and ceiling effects, respectively
# and estimate the true mean and variance from the data with floor and ceiling effects
x.cf=induce.cfe(.2,.1,x)
rec.mean.var(x.cf)
|
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.