Research in environmental psychology suggests that 'biophilic design'—incorporating natural elements like foliage into indoor environments—can mitigate mental fatigue and reduce digital distractions. A team of educational psychologists wants to use an experimental design to investigate whether the presence of live potted plants in a university library private study cubicle increases the duration of continuous study (measured in minutes) before a student first checks their mobile phone, compared to a standard cubicle with no plants.
Write a one-tailed alternative hypothesis for this study.