Better barley Does drying barley seeds in a kiln increase

Chapter , Problem R9.9

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QUESTION:

Better barley Does drying barley seeds in a kiln increase the yield of barley? A famous experiment by William S. Gosset (who discovered the t distributions) investigated this question. Eleven pairs of adjacent plots were marked out in a large field. For each pair, regular barley seeds were planted in one plot and kiln-dried seeds were planted in the other. The following table displays the data on yield (lb/acre).35 Plot Regular Kiln 1 1903 2009 2 1935 1915 3 1910 2011 4 2496 2463 5 2108 2180 6 1961 1925 7 2060 2122 8 1444 1482 9 1612 1542 10 1316 1443 11 1511 1535 (a) How can the Random condition be satisfied in this study? (b) Perform an appropriate test to help answer the research question. Assume that the Random condition is met. What conclusion would you draw?

QUESTION:

Better barley Does drying barley seeds in a kiln increase the yield of barley? A famous experiment by William S. Gosset (who discovered the t distributions) investigated this question. Eleven pairs of adjacent plots were marked out in a large field. For each pair, regular barley seeds were planted in one plot and kiln-dried seeds were planted in the other. The following table displays the data on yield (lb/acre).35 Plot Regular Kiln 1 1903 2009 2 1935 1915 3 1910 2011 4 2496 2463 5 2108 2180 6 1961 1925 7 2060 2122 8 1444 1482 9 1612 1542 10 1316 1443 11 1511 1535 (a) How can the Random condition be satisfied in this study? (b) Perform an appropriate test to help answer the research question. Assume that the Random condition is met. What conclusion would you draw?

(a) The Random condition is satisfied if each pair of plots is randomly assigned to treatment and control groups. For example, if Plot 1 is assigned to the regular group, then Plot 2 should be assigned to the kiln group, and so on. (b) You can perfor