E-commerce and online shopping are creating a rapidly growing demand for parcel delivery services. The key factors of customers' satisfactions are both the speed and frequency of delivery which require more efficient flow of parcels through the transportation. To help improve it transportation network performance, a private postal service in North America conducted a survey to analyze the relationship between delivery results (1: on-time and 2: late) and transportation mode (1: regular, 2: express, and 3: weekend delivery). A sample of 70 deliveries was asked from the sale department. Data can be found in the Excel file Data-AS2.XLSX (Ecom) in the Excel directory. Do these data allow us to infer that the delivery results are affected by the transportation mode (1% significance)?