A market researcher is interested in knowing the type oftraining that works best

A market researcher is interested in knowing the type oftraining that works best for DVD users. Thirty consumers arerandomly selected from a population of known DVD owners (i.e.users). Ten users are trained by giving them the DVD users manualand allowing them to read it. Another 10 users are trained from a30 minute DVD user training video. Another 10 users are trainedfrom a self-paced computer tutorial. The users are then timed intheir ability to setup and program the DVD by performing a seriesof operations.