Spencer is the owner of Island Art, a retail establishment in the beach community of Stone Harbor, New Jersey. He would like to develop a probability model to predict the number of customers who visit his establishment each day during the summer season. The Excel file Island Art 1.xlsx shows the number of customers who entered his store over 240 business days during past summer seasons. Using α = 0.05, determine if the number of customers per day visiting Island Art follows the normal probability distribution.