You have completed conducting the online surveys among the customers of the mobile network company. The respondents were selected randomly from a database listing provided by the mobile network company. An initial invitation email was sent out to the selected respondents, together with a link to the survey website. A week after the first email, two reminder emails were sent out one week after another. In total, 23,800 respondents were selected and 310 respondents completed the online survey. What is the research methodologies used in the study and also the data collection process for the online survey?