Suppose that a third class (W) of 15 students was observed along with classes U and V of Exercise 9.2-3, resulting in scores of

Again, use a chi-square test with α = 0.05 to test the equality of the three distributions by dividing the combined sample into three equal parts.

91 73 67 83 59 98 87 69 78 80 65 94 82 74 85