Phillips-Perron test for unit root Number of obs = 11
Newey-West lags = 2
---------- Interpolated Dickey-Fuller ---------
Test 1% Critical 5% Critical 10% Critical
Statistic Value Value Value
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Z(rho) -6.348 -17.200 -12.500 -10.200
Z(t) -1.838 -3.750 -3.000 -2.630
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MacKinnon approximate p-value for Z(t) = 0.3619
其中的Z(rho)和Z(t) 是什么意思啊