Mathematics, 16.04.2020 00:23 cia196785920
The tensile strength of Portland cement is being studied. Four different mixing techniques can be used economically; the results of an experiment to compare the mean strengths among these techniques is contained in the file "cement." (a) (5 points) Use ANOVA to test the hypothesis that mixing techniques have no effect on the strength of the cement. Use = 0.05. (b) (5 points) Plot the residuals versus predicted strength. What does the plot suggest regarding assumptions for our underlying ANOVA model. (c) (5 points) Construct a normal probability plot of the residuals. Is the normal error assumption for ANOVA met? (d) (5 points) Use Tukey’s HSD to determine which techniques have different mean strengths, if any. Use an overall = 0.05.
Answers: 2
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Arectangular prism is 3 meters long, 6 meters wide, and has a height of 9 meters. what is its surface area?
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Sherrie is baking a pie for her family. she leaves the room and comes back to 35% of the pie having been eaten before she can put the topping on. how much 1 square inch strips of dough will she need for the top, now that a portion is missing? round your answer to the nearest while nimber.
Answers: 1
The tensile strength of Portland cement is being studied. Four different mixing techniques can be us...
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