Nominal, Ordinal, Interval, and Ratio are defined as the four fundamental levels of measurement scales that are used to represent data from quantitative and qualitative studies. Each scale is an incremental level of measurement, meaning, each scale fulfills the function of the previous scale. Categorical: Nominal or ordinal (Non-Metric) Nominal...

Alex Russell, School of Health, Medical and Applied Sciences, Central Queensland University: There are a few factors at play here. People aren’t only stockpiling toilet paper. All sorts of items are sold out, like face masks and hand sanitiser. Things like canned goods and other non-perishable foods are also selling...