May
1
Here are the mean monthly returns for gold ETF "GLD", 2002-present, by two groups: months Nov-Apr, and months May-Oct (vs zero):
One-Sample T: nov-apr, may-oct
Test of mu = 0 vs not = 0
Variable N Mean StDev SE Mean 95% CI T P
nov-apr 41 0.02504 0.05267 0.0082 ( 0.0084, 0.0416) 3.05 0.004
may-oct 36 0.00851 0.05303 0.0088 (-0.0094, 0.0264) 0.96 0.342
> Both positive, but only the mean for months nov-apr is significantly different from zero (and 3x greater than may-oct)
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