It is simple to do. I am using the Big Class data set from the sample data library.
- Select Rows > Add Rows. Add 90 rows in your case. I added 60 to the existing 40 in Big Class.
- Select Cols > New Column. I called it Simulated weight for Big Class example.
- Add a formula that samples without replacement from the existing variable, weight in this case.
![Capture.JPG Capture.JPG](https://community.jmp.com/t5/image/serverpage/image-id/5639i1188E56C3D0677F1/image-size/large?v=v2&px=999)
Making this formula is easy:
- Select the source data column.
- Select Row > Subscript.
- Select Random > Random Integer.
- Enter 1 for the lower limit.
- Click Insert ("^") key.
- Enter 10, in your case, 40, in my case for the upper bound.