Complex sentence: It has been determined that this age groupuses the internet on average four hours more per month than the age group 18-24, and spend a majority of their time using search engines and online shopping sites.
Split into simpler sentences: It has been determined that this segment of now uses the internet on average four hours more per month than the age group 18-24. Research shows that the silver surfers are spending a majority of their time using search engines and online shopping sites.