It is the number from which all of the other numbers vary due to their values and parameter estimates. The t-ratio measures the statistical significance or confidence of the parameter estimate. This determines whether the variable actually matters in the prediction of the dependent variable. The variability of the coefficient determines the t-ratio. Divide this by 41 home games and you get an average decline of 190 people per game.
More people go to games in larger stadiums.
This says that for every seat that you add, it will get filled about 5 times per season. This is useful in determining whether or not to expand the stadium. Another team in the SMSA reduces season attendance for one team by 185,506. No - reduces attendance by 9,397 but not significant. Probably - reduces attendance by 33,766, reasonably significant.