for Evelyn
A market researcher is interested in knowing the type of
training that works best for DVD users. Thirty consumers are
randomly selected from a population of known DVD owners (i.e.,
users). Ten users are trained by giving them the DVD user's manual
and allowing them to read it. Another ten users are trained from a
30 minute DVD user training video. Another ten users are trained
from a self-paced computer tutorial. The users are then timed in
their ability to setup and program the DVD by performing a series
of operations. Which statistical analysis technique should be used?
What is the null hypothesis? Can the market researcher get an
answer? Why or why not?

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