The effects on the outcome of the change in one factor may depend on the level of the other factor, so we need to consider the interactions between two factors. Two way ANOVA is an appropriate method to analyze the main effects of and interactions between two factors. Minimum Origin Version Required: Origin 2016 SR0.
Nosing â An edge part of the tread that protrudes over the riser beneath. If it is present, this means that, measured horizontally, the total ârunâ length of the stairs is not simply the sum of the tread lengths, as the treads actually overlap each other slightly.
Steps. 1. Measure 1 stair tread, which is the horizontal part of the stair on which you step, from one side to the other side, from the wall to the rails. 1  Round your measurement to the nearest foot (meter), and record the width measurement.. Measure across the tread, from where the riser (the vertical part) meets it and down the height of the riser. 1  For this measurement, you are measuring in the opposite direction from your first measurement, across the short distance of the tread.