LSMeans Difference Set Use the radio buttons to specify the set of differences for which you want to compute power curves. Note : This parameter is enabled only if LSMeans Effects have been specified. Options are as follows: Option Definition All Pairwise Differences • Differences between all possible pairs of levels. Caution : This option can generate numerous differences when there are many levels in your LSMeans effects. Simple Differences • All differences for which only one level has changed. Differences with a Control • Differences against a single reference level. • You can specify this level in the LSMeans Control Levels parameter. For detailed information about the files and data sets used or created by JMP Life Sciences software, see Files and Data Sets . To Specify an LSMeans Difference Set: Click the radio button of the desired LSMeans Difference Set.