Q1 A. The following data refers to yield of tomatoes (kg/plot) for four different levels of...

A. The following data refers to yield of tomatoes (kg/plot) for four different levels of salinity. Salinity level here refers to electrical conductivity (EC), where the chosen levels were EC = 1.6, 3.8, 6.0 and 10.2 nmhos/cm

EC in nmhos/cm						T_i
1.6	59.5	53.3	56.8	63.1	58.7	291.4
3.8	55.2	59.1	52.8	54.5		221.6
6.0	51.7	48.8	53.9	49.0		203.4
10.2	44.6	48.5	41.0	47.3	46.1	227.5

I- Use the F test at level α = 0.05 to test for any differences in true average yield due to the different salinity levels. (use the method given in the lecture notes only)

II- What happens when Tukey’s procedure is applied?

B- For the following pairs of assertions, indicate which do not comply with our rules for setting up hypotheses and why (the subscripts 1 and 2 differentiate between quantities for two different populations or samples).

I. Ho: µ = 100, Ha: µ >100

II. Ho: p ≠ 0.25, Ha: p = 0.25

III. Ho: S²1 = S²2, Ha: S²1 ≠ S²2

IV. Ho: s1/s2 = 1, Ha: s1/s2 ≠ 1

Solutions

Expert Solution

orchestra answered 1 year ago

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