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

Show answers

Another question on Mathematics

Mathematics, 21.06.2019 17:30

At a sale this week, a desk is being sold for $213. this is a 29% discount from the original price. what is the original price?

Answers: 1

Answer

Mathematics, 21.06.2019 19:30

Are triangles the congruent? write the congruency statement.what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?

Answers: 1

Answer

Mathematics, 21.06.2019 22:10

Given: ae ≅ ce ; de ≅ be prove: abcd is a parallelogram. we have that ab || dc. by a similar argument used to prove that △aeb ≅ △ced, we can show that △ ≅ △ceb by. so, ∠cad ≅ ∠ by cpctc. therefore, ad || bc by the converse of the theorem. since both pair of opposite sides are parallel, quadrilateral abcd is a parallelogram.

Answers: 1

Answer

Mathematics, 22.06.2019 01:00

What is the y-intercept of the line with the equation 3x + 4y = 12?

Answers: 1

Answer

You know the right answer?

The tensile strength of Portland cement is being studied. Four different mixing techniques can be us...

Questions