At the Jean Talon's farmers' market, varieties of apples are usually displayed side by side during fall harvest season. Last fall, it was noted that in one day, 220 customers purchased apples. Of these, 70 picked McIntosh, 60 SuperMac, 50 picked Cortland, and 40 picked Belmac apples. What is the approximate p-value for testing the appropriate hypothesis for the preferred type of apples in the city?