BIOL 528 Quiz 6

Fill in the missing value (df Error ) of the ANOVA table: df SS. MS Fclac Treatment. 2 6534 --- --- Error. 16802. --- Total 29 -----

27

You are a researcher here at UNH examining the balance of fertilzer to use on tomato plants grown in a high tunnel (type of greenhouse). You have three different fertilizers to test and you using 10 plots per fertilizer type. What is the F-crit for treatment (fertilizer type) in your analysis? Use alpha of 0.05 and the ErrorDF closest to your ErrorDF

3.35

Fill in the missing cell of the ANOVA table (MStreatment). df SS. MS Fclac Treatment. 2 6534 5.24 Error. -- 16802. 622 Total 29 -----

3267

You have been asked to test a difference of average (corn) yield from 3 different seed varieties. The appropriate test to use for this research question is:

ANOVA

True or False: You have rejected a one-way (simple) ANOVA that tested the difference of means in the blood pressure of python snakes given 3 different types of medication (medication A, B, and control). There were 5 pythons in each medication type for a total of 15 pythons in the experiment. The value of q you will use in your Tukey test is 3.67.

False

The null hypothesis of an ANOVA tests that there is NO significant difference between groups/treatments. If you reject the null, you can support the alternative hypothesis that at least one group differes signifanctly, but you don't know which group(s) differ significantly.

True

True or False: You have calcuated a one-way (or fixed) ANOVA to test for a difference of average corn yields across 3 different seed varieties. Your Fcalc is 5.259 and your Fcrit is 3.35. You should reject your null hypothesis of no difference in corn yields between seed varieties.

True

If you have tested for a difference of means across three groups and you find that you REJECT the null hypothesis supporting your alternative hypothesis that at least one of the groups has a significant difference. To determine which group(s) significantly differ you can use which test:

Turkey Test

Choose the best hypothesis test: You are conducting research on the effects of salinity on larvae survival of Gasterosteus aculeatus. You set up an experiment with 2 different mesocosms (really large fish tanks) with a different level of salinity and in each mesocosm you have 20 Gasterosteus aculeatus larvae in each mesocosm. You will calculate survival as days since hatching.

independent samples t-test

True or false: the F-distribution (critical area table) has 2 degrees of freedoms because it examines the ratio of variance due to treatment(s) and the error variance.

true