7.45 Weeds among the corn. Lambs-quarter is a common weed that interferes withthe growth
Chapter 0, Problem 7.44(choose chapter or problem)
7.45 Weeds among the corn. Lambs-quarter is a common weed that interferes withthe growth of corn. An agriculture researcher planted corn at the same rate in16 small plots of ground, then weeded the plots by hand to allow a fixed numberof lambs-quarter plants to grow in each meter of corn row. No other weeds wereallowed to grow. Following are the yields of corn (bushels per acre) in each of theplots:20Weeds Corn Weeds Corn Weeds Corn Weeds Cornper meter yield per meter yield per meter yield per meter yield0 166.7 1 166.2 3 158.6 9 162.80 172.2 1 157.3 3 176.4 9 142.40 165.0 1 166.7 3 153.1 9 162.80 176.9 1 161.1 3 156.0 9 162.4Blickwinkel/Alamy(a) What are the explanatory and response variables in this experiment?(b) Make side-by-side stemplots of the yields, after rounding to the nearestbushel. Give the median yield for each group (using the unrounded data). Whatdo you conclude about the effect of this weed on corn yield?
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