Mobile Apps. Kate is a mobile apps developer. She conducts a survey to get feedback on her most recently developed mobile app in order to improve it. Her survey questions cover the gender of each user, the age of each user, whether the app runs smoothly or not, whether users like the app design, if it helps users achieve their goals, and if users would recommend this app to their friends. Apart from specifying their gender and age, user responses are based on a 5-point Likert scale (1 = strongly disagree to 5 = strongly agree).