From: Kenneth Frost
Hello,
I would like to know if there is a function in R that will test for
normality and handle censored data sets. Currently, I evaluate each
censored data set by the extent to which a normal scores plot
approximate a straight line. For complete data sets I use
shapiro.test().
Below is an example of a censored data set.
data1<-c(0.00, 0.00, 0.00, 5.86, 5.17, 8.17, 5.12, 4.92,
7.08, 5.73,
5.44, 6.61, 6.34, 6.23, 5.97, 5.86, 5.15, 7.98, 6.72, 5.15,
3.58, 6.86,
6.12, 4.58, 6.07, 5.38, 5.21, 3.78)
The zero values occur because I cannot detect a pathogen with a value
below 2.4. Using shapiro.test(), it seems that the data are
different
from a normal distribution. However, the normal scores plot suggest
otherwise.
Using R version 1.9.1
Thanks in advance.
Ken