One evening, Junior NTR, Ram , and Rajamouli were having a casual conversation over tea. During a light moment, they were trying to establish that the treadmills each of them owned provided the best value for money in terms of electricity consumption. Junior NTR uses a Horizon machine, Ram uses a Nordic, and Rajamouli, a Proform machine. They decided to track the electricity consumption of their machines daily for two months (all of them had a feature that displayed electricity consumption (in units per hourly usage) on their console). All three of them use treadmill for 90 minutes daily, regardless of how busy they are. The next time they met, they brought the daily electricity consumption data to the table (60 daily values for electricity consumption for each). Help them decide which of the treadmills provided the best value for money. Or, were they all at the same level? You may explain the process.