A) a researcher wants to test the effect of using a lumbar support pillow on angular position of the pelvis in relaxed sitting. the researcher hypothesizes that pelvic tilt will change with use of a support pillow (a non-directional hypothesis). the researcher tests eight subjects, each one sitting relaxed in a straight-back chair with and without the pillow (in random order). the angle of the pelvic tilt is measured using a flexible ruler, with measurements transformed to degrees.