A researcher wants to know if their new energy storage device can outperform the current model which lasts 18 hours with continuous use. The researcher collects a sample of 17 of the new devices and calculates an average life of 21.3 hours with a standard deviation of 4.2 hours. Do they have sufficient evidence to conclude that the new device lasts longer? What test would you recommend they use? Chi-square test 1 prop Z test T test Z test