CREATE TABLE table_7202 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Attendance" FLOAT)

What's the mean week number when attendance was 63,263?
SELECT AVG("Week") FROM table_7202 WHERE "Attendance" = '63,263'
SELECT AVG("Week") FROM "table_7202" WHERE "Attendance" = '63,263'