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Question 5
In Assignment 1 you measured the length etc. of leaves on north and south sides of a tree (or pair of trees).
(a) Use a two-sample t-test within Minitab to test the hypothesis that the mean length of leaves on the north side is the same as the mean length of leaves on the south side.What do you conclude? (Show the Minitab output).
(b) In fact you collected data in 4 groups, using north and south and stratum 1 and stratum 2. Create a new column variable with four levels corresponding to the 4 groups. Use a one-way ANOVA to test the hypothesis that all four groups of data have the same mean. State your null and alternative hypothesis clearly. You may use Minitab to perform the calculations. What do you conclude?
(c) What assumptions are necessary in order for the ANOVA to give valid conclusions?
Attachment:- 227807_1_Statistics-Assignment.doc
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