The probability that a person going up uses the lift can be estimated by
62/85=0.73 during off-peak times, and 16/24=0.67 during peak periods. The probability that a person using the lift is going up can be estimated by 62/97=0.64 during off-peak periods, and by 16/164=0.1 during peak periods. These and other estimates lead to a wealth of discussion, and key questions about the context and the
data collection methods – questions that are core to the data investigation cycle.