The manager of a door-making company would like to estimate the amount of time it takes...

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The manager of a door-making company would like to estimate theamount of time it takes for a piece of wood to be moved, cut, andpackaged at two different plants. At Plant A, the manager observed21 pieces that processed with an average time of 14.2 minutes andstandard deviation of 2.6 minutes. At the second plant, the managerobserved 19 pieces with an average time of 13.1 minutes with astandard deviation of 1.9 minutes.
a. Test whether there is a difference between mean process timesof Plants A and B with an assumed ? = 0.1. State your conclusionproperly with context.
b. What three assumptions are required to perform the abovetest?
c. Using the above information and ? = 0.1 significance level,test to see if the plants have different variability. State yourconclusion properly with context.

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4.5 Ratings (748 Votes)

AH0 vs Ha Test statistic ist 1514Critical value is t0138 130Since tcalt138 we rejectH0 and conclude the difference in mean of two processesis significantBThe assumptions of See Answer

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