I'm not sure if you can directly modify Summary Statistics with custom data, but you could create your own Summary Statistics with something like this:
Names Default To Here(1);
dt = Open("$SAMPLE_DATA/Big Class.jmp");
obj = dt << Distribution(Column(:Height));
obj << Summary Statistics(1);
a = report(obj);
b = a["Summary Statistics"][TableBox(1)];
//values from current summary statistics
vals = b << get;
//add new text value
Insert Into(vals[1], "Failure Rate");
//get new num value
valueOver = N Items(dt << Get Rows Where(:weight >= 100));
//add new number value based on N index
Insert Into(vals[2], valueOver);
//create custom summary statistics
a << Append(
Outlinebox("Summary Statistics Custom",
Table Box(
String Col Box("",vals[1], << Background color(80)),
Number Col Box("",vals[2])
)
)
);
//hide original summary statistics
//obj << Summary Statistics(0);
-Jarmo