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Experimental design & ANOVA

Is there any difference in the average accuracy level after differing amounts of computer intensive work?

b). Is there any difference in the average accuracy level to complete the task for the right hand versus the left hand?

c). Is there a significant interaction effect?

d). What is your recommendation to this manager?

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a.)
See 1st sheet of attached file.
Hypothesis: Ho:beta1 = beta2 = beta3 = beta4 = 0
where, beta(j) = mu(j) - mu
because,
F(0.05) > F observed, hence Ho is accepted, i.e., there is no difference ...

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The solution answers the question(s) below.

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