=+to three levels of pH to see whether this factor has an effect on virus uptake into the root system. The following table shows data from a 2 3 3 experiment to study both factors:

pH 3 5.5 7 1.2, 1.4, .8, .6, 1.0, 1.0, Diseased 1.0, 1.2, .8, 1.0, 1.2, 1.4, 1.4 .8 1.2 Health status 1.4, 1.6, 1.0, 1.2, 1.2, 1.4, Healthy 1.6, 1.6, 1.2, 1.4, 1.2, 1.2, 1.4 1.4 1.4 The response variable is an average rating of five buds from a seedling. The ratings are 0 (bud not broken), 1 (bud partially expanded), and 2 (bud fully expanded).