1
15m
Well…I did it, but not exactly how it was described. But it did work 
I finally figured out, I had to create my stud, off the base plate, then move the single stud into position on the base plate.
I then made the single stud into a group, I selected a lower corner with Move, then hit Ctrl. C. I saw a tiny little “+” sign appear, I then moved the selected stud a little in the direction I wanted, and typed 16" into the distance box and hit enter, which placed another stud 16" away, then I immediately hit the “*” and typed in 35, and hit enter, which placed all studs down on the base plate. I could not immediately type in another number of studs to place as Shep stated. If I wanted to put more studs down on the same base plate, then I had to do the whole procedure again, beginning from the last stud in line. So I did something wrong, but it finally worked. I think the trick, for me, is waiting to see the tiny little “+” sign.
Thanks for the help!