Each of three comparable classes of 15 students responded to three different methods of instructions, giving the following scores on a standardized test: Class U: 91 42 39 62 55 82 67 44 51 77 61 52...

Extracted text: Each of three comparable classes of 15 students responded to three different methods of instructions, giving the following scores on a standardized test: Class U: 91 42 39 62 55 82 67 44 51 77 61 52 76 41 59 Class V: 80 71 55 67 61 93 49 78 57 88 79 81 63 51 75 Class W: 91 73 67 83 59 98 87 69 78 80 65 94 82 74 85 Use a chi-square test with a = scores by dividing the combined sample into three equal parts (low, middle, high). 10.4, reject Ho) 0.05 to test the equality of the distributions of test (q