Question
You may need to use the appropriatetechnologyto answer this question.To test whether the mean time needed to mix a batch of material is the same
You may need to use the appropriatetechnologyto answer this question.To test whether the mean time needed to mix a batch of material is the same for machines produced by three manufacturers, a chemical company obtained the following data on the time (in minutes) needed to mix the material.
Manufacturer | ||
---|---|---|
1 | 2 | 3 |
19 | 29 | 21 |
26 | 26 | 19 |
24 | 32 | 23 |
23 | 29 | 17 |
(a)Use these data to test whether the population mean times for mixing a batch of material differ for the three manufacturers. Use
= 0.05.
State the null and alternative hypotheses.H0:1=2=3 Ha: Not all the population means are equal.H0: Not all the population means are equal. Ha:1=2=3 H0: At least two of the population means are equal. Ha: At least two of the population means are different.H0:123 Ha:1=2=3H0:1=2=3 Ha:123
Find the value of the test statistic. (Round your answer to two decimal places.)
Find thep-value. (Round your answer to three decimal places.)p-value =
(b)At the= 0.05 level of significance, use Fisher's LSD procedure to test for the equality of the means for manufacturers 1 and 3.
Find the value of LSD. (Round your answer to two decimal places.)LSD =
Find the pairwise absolute difference between sample means for manufacturers 1 and 3.
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