Table 5.  Number of Market Advisory Services above Alternative Market Benchmark Prices, Corn, 1995 -1998
             
Number Proportion
Number of of Services of Services
Market Benchmark/ Advisory above above Two-tail
Sample Period Services Benchmark Benchmark Z-statistic p-value  
24-Month Average sigp one-tail
1995 25 18 0.72 2.20 0.03 ** 0.04 0.72 0.10 0.9861 0.0139 0.9927
1996 26 10 0.38 -1.18 0.24 0.25 0.38 0.10 0.1197 0.8803 0.1635
1997 23 10 0.43 -0.63 0.53 0.54 0.43 0.10 0.2658 0.7342 0.3388
1998 23 7 0.30 -1.88 0.06 * 0.07 0.30 0.10 0.0303
1995-1998 97 45 0.46 -0.71 0.48 0.48 0.46 0.05 0.2386 0.7614 0.2713
20-Month Average
1995 25 13 0.52 0.20 0.84 0.52 0.10 0.5793 0.4207 0.6550
1996 26 10 0.38 -1.18 0.24 0.38 0.10 0.1197 0.8803 0.1635
1997 23 15 0.65 1.46 0.14 0.65 0.10 0.9278 0.0722 0.9534
1998 23 12 0.52 0.21 0.83 0.52 0.10 0.5826 0.4174 0.6612
1995-1998 97 50 0.52 0.30 0.76 0.52 0.05 0.6197 0.3803 0.6576
16-Month Average
1995 25 3 0.12 -3.80 0.00 *** 0.12 0.10 0.0001 0.9999 0.0001
1996 26 15 0.58 0.78 0.43 0.58 0.10 0.7836 0.2164 0.8365
1997 23 17 0.74 2.29 0.02 ** 0.74 0.10 0.9891 0.0109 0.9947
1998 23 22 0.96 4.38 0.00 *** 0.96 0.10 1.0000 0.0000 1.0000
1995-1998 97 57 0.59 1.73 0.08 *** 0.59 0.05 0.9578 0.0422 0.9665
Note:  Three stars indicates significance at the 1% level, two stars indicates significance at the 5% level, and one star indicates significance at the 10% level.