Question 2 1 pts A teacher proposes a course designed to increase reading speed. To evaluate...
Question 2 1 pts A teacher proposes a course designed to increase reading speed. To evaluate the effectiveness of this course, the teacher tests students before and after the course. The result is following student 1 2 3 4 5 Speed before class 100 160 120 167 200 Speed after class 136 170 135 169 210 The difference in the reading speeds (before-after) for this sample results in d = –14.6 and 8d = 12.84. Assume that the reading speeds are approximately normally distributed. Is the course effective to improve the reading speed? Choose the appropriate hypotheses to test the claim. OH : d = 0 Had > 0 Ho: Md = 0 Ha: ud > 0 OH : d=0 Had < 0 OHO: Md=0 Ha: Md < 0 0 Ho : Ad = 0 Ha: Md 70