HOW DO I CALCULATE THE VALUE OF Z?Give working out.

URGENT: Solve for Z What is the value of Z? Please provide working out/ method. URGENT: Solve for Z What is the value of Z? Please provide working out/ method. Regression Statistics Multiple R 0.9683 R Square 0.9376 Adjusted R Square 0.9162 Standard Error 172.3823 Observations u ANOVA Significance SS MS Regression W 15622112.33 1301842.69 V 1.8215E-17 Residual 35 1040048.15 29715.66 Total 47 16662160.48 Standard Coefficients Error t Stat P-value Lower 95% Upper 95% Intercept 1885.85 97.87 19.27 3.24902E-20 1687.16 2084.54 Time 3.32 1.85 1.79 0.08243174 -0.45 7.08 Nov -0.82 y -0.01 0.994697478 Dec 908.12 121.95 7.45 1.02255E-08 660.55 1155.69 Jan 85.05 Z 0.490384364 Feb 162.99 0.190606107 -84.93 410.90 Mar -156.58 0.208661908 404.75 91.59 Apr -485.35 0.000345102 -733.84 236.87 May -1166.17 2.86746E-11 1414.34 -918.00 Jun -1212.99 1.01088E-11 -1460.90 -965.07 Jul -67.30 0.584749126 -315.02 180.41 Aug -544.37 8.00406E-05 -791.94 -296.80 Sep -524.93 0.000127692 -772.42 -277.45