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Statistical analysis technique to know type of training

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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?

NOTE: When performing computations, please use an Excel spreadsheet and please
do not just provide the answers but show in complete detail how you arrive at the
answers, step-by-step, from the beginning to the end of the solution.

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Since we have three categories to compare, we use ONE-WAY ANOVA to find out if there are any differences in the

three methods of training.

The hypotheses would be:

Null, Ho: The ...

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