Question
You may need to use the appropriatetechnologyto answer this question.The following data are from a completely randomized design. Treatment A Treatment B Treatment C 31
You may need to use the appropriatetechnologyto answer this question.The following data are from a completely randomized design.
Treatment A | Treatment B | Treatment C | |
---|---|---|---|
31 | 45 | 32 | |
29 | 42 | 37 | |
29 | 43 | 36 | |
26 | 45 | 36 | |
35 | 50 | 39 | |
Sample mean | 30 | 45 | 36 |
Sample variance | 11.00 | 9.50 | 6.50 |
(a)At the= 0.05 level of significance, can we reject the null hypothesis that the means of the three treatments are equal?
State the null and alternative hypotheses.
H0:ABC Ha:A=B=C
H0: At least two of the population means are equal. Ha: At least two of the population means are different.
H0:A=B=C Ha: Not all the population means are equal.
H0:A=B=C Ha:ABC
H0: Not all the population means are equal. Ha:A=B=C
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 =
State your conclusion.
Do not rejectH0. There is sufficient evidence to conclude that the means of the three treatments are not equal.
Do not rejectH0. There is not sufficient evidence to conclude that the means of the three treatments are not equal.
RejectH0. There is not sufficient evidence to conclude that the means of the three treatments are not equal.
RejectH0. There is sufficient evidence to conclude that the means of the three treatments are not equal.
(b)Use Fisher's LSD procedure to test whether there is a significant difference between the means for treatments A and B, treatments A and C, and treatments B and C. Use= 0.05.Find the value of LSD. (Round your answer to two decimal places.)LSD = Find the pairwise absolute difference between sample means for each pair of treatments.
xAxB
=
xAxC
=
xBxC
=Which treatment means differ significantly? (Select all that apply.)
There is a significant difference between the means for treatments A and B.
There is a significant difference between the means for treatments A and C.
There is a significant difference between the means for treatments B and C.
There are no significant differences.
(c)Use Fisher's LSD procedure to develop a 95% confidence interval estimate of the difference between the means of treatments A and B. (UsexAxB.
Round your answers to two decimal places.) to
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