What is the name of your data file?
The name should be unique to you to prevent the file from being accidentally
overwritten by another user.
The first rows of your data file must contain the names of
the factor levels. For example, if you want to conduct a 3x2x2
analysis of variance (3 factors, 3 levels in the first factor, 2
levels in the second and third factors), the first row should contain
the names of the three levels of the first factor, e.g.,
small medium large
They must be separated by blanks (and, of course, can contain no
blanks). The second row must contain the names of the two levels of
the second factor, e.g.,
The third row must contain the names of the two levels of the third
Level names can contain no more than 10 characters.
small medium large
After the names of the levels, the remaining rows of the data file
must each contain two items.
The first column must contain a specimen ID. The specimen ID's
must not contain blanks. Only the first 20 characters of the ID's
will be retained in the output. The second column must contain the
predictor value for the specimen. There may be no
more than 5000 specimens.
Before you proceed, you must transfer this
data file to www1.fpl.fs.fed.us via
You must place it in the pub/tt directory.
(If ftp does not run on your machine, e-mail your data to
firstname.lastname@example.org and ask me to place
it in the appropriate anonymous ftp directory. I will
do so and notify you via e-mail. You can then run the Tight T program
over the Web.)
How many factors are there?
(e.g., 3 for a three-way ANOVA)
How many levels are there?
(e.g., 3 2 2 for a 3x2x2 ANOVA.
There must be a total of 25 or fewer levels.)
How many replicates are there per factor combination?
(e.g., to have 5 replicates in a 3x2x2 ANOVA,
a total of 5x3x2x2 specimens would be required.)
What is the starting value for the random number generator?
(It must be a positive integer less than 1000000000.)
The "random" numbers that are generated are exactly determined
by the starting value. Thus, if you want a different set of "random"
numbers, you must supply a different starting value.