8. To determine which of the two types of seeds is better, a state agricultural station chooses 9 twoacre plots of land randomly within the state. Each plot is split in half, and a coin is tossed to determine in an unbiased way which half will be sown with seed A, and which half with seed B. Of course, the yields from each state will depend on the soil fertility as well as the climate of that state, and hence the yields of the two seeds within each state are not independent. The yields, in bushels, are recorded as follows: PlotPQRSTUVHK SeedA 82 68 154 93 78 148 89 63 98 SeedB 89 69 173 91 81 150 97 64 117 Which seed is better? To back up your answer, construct an appropriate 95% con dence interval and state the assumptions required