If you're going to do a study on automobile infotainment systems, you need a broader set of data: 46 people with 7 types of systems, 2 of which are very uncommon. This dataset sounds like they just asked around their office and of the 46 people that work there, only 7 employees had any sort of infotainment system, 3 being the bosses.
Want to do this study right? Go rent 10-12 cars with the various systems, park them at Walmart one day and survey, park them at the mall the next day and survey, park them at the fancy downtown shopping district and survey, and then hold a private dinner for the upper-class folks and survey. 4 distinct groups and hundreds or thousands of data points.
Be sure to include systems that actually are used: Toyota Entune, Ford Sync, GM/Chevrolet Intellilink/MyLink, Honda HondaLink, Dodge/Chrysler Uconnect, Nissan NissanConnect, Mazda, Volkswagen, BMW ConnectedDrive, Mercedes Comand, and Cadillac CUE.
Come on, how many people actually have a Porsche with an infotainment, or a Tesla? Seriously, Ford sold twice as many Fiesta's in the US last year than Tesla has sold total.