Manufacturer A B C D 25 23 25 27 23 21 25 26 21 23 25 27 23 24 ...

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Basic Math

Manufacturer
A   B   C   D
25   23   25   27
23   21   25   26
21   23   25   27
23   24   21   26
To test whether the mean time needed to mix a batch of material isthe same for machines produced by 4 manufacturers, the JacobsChemical Company obtained the following data on the time (inminutes) needed to mix the material.
What is the p value?
Does the data provide strong evidence evidence against Ho orweak evidence?
Are the mixing machine considered all equal?

Answer & Explanation Solved by verified expert

3.6 Ratings (613 Votes)

Define the null and the alternatehypothesis as follows The average mixingtime is different in atleast one of the 4 machinesLet denote thenumber of samples In this case Let denote the number of observations in the sample respectively In this case eachThe total sample size isThe value of the test statistic say is foundusing the formulawhere denotesthe See Answer

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