(a) Make a table giving the sample size, mean, and standard deviation for each t

Question

(a) Make a table giving the sample size, mean, and standard deviation for each type of pot. Is it reasonable to pool the variances? Note that with the small sample sizes in this experiment, we expect a large amount of variability in the sample standard deviations.

b) Run the analysis of variance. Report the F statistic with its degrees of freedom and P-value. What do you conclude? (Round your test statistic to two decimal places. Round your P-value to three decimal places.)
F = _____________
P = _____________

Conclusion: There is (no, a) statistically significant difference between the three treatment means at the = .05 level.

Type of Pot n s Aluminum Clay Iron

Explanation / Answer

from above data:

b)

by using Above data below is ANOVA table:

F =79.41

P =0.0000

Conclusion :There is a statistically significant difference between the three treatment means at the = .05 level.

Groups n Xbar s sbar Aluminum 4 2.2325 0.3014 0.1507 Clay 4 2.4050 0.3704 0.1852 Iron 4 4.5425 0.1491 0.0745

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