Ex11_S11-Analysis

# Ex11_S11-Analysis - Group Members_Exercise_Date LI Unique...

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Group Members: _________________________________________________Exercise_______Date: ___________ LI ______________________ Unique __________ Day: __________ Room: _______ Lab Start Time ________ Exercise 11 Analysis To be completed as a group and turned in at the beginning of your next laboratory period. Include your “Data & Results”, sketches, acquired digital images, etc. as directed by your laboratory instructor. Show your work for all calculations and/or print your MS Excel data sheets. Be sure to include proper units where necessary. Adhere to University’s Honor Code and course policies. Balance between brevity and completeness. 1. Conduct a Wilcoxon Signed Rank Test of statistical significance on each of the two sets of data that you collected (i.e., own nest vs. foreign nest comparison and own nest vs. non-nest comparison). The hypothesis tested is that the ants cannot distinguish between their own nest soil and foreign soil or their own nest soil and non-nest soil. This is called a "null" hypothesis; you can reject this hypothesis as a result of your analysis if your analysis establishes that the ants demonstrate a statistically significant preference for their own nest material. Your observed values will be the numbers in the column that contains the data on the percentage of the total test time that an ant spent on its own nest soil. Your expected values will all be 50%, which is the percentage of the total time you would expect an ant to spend on its own nest soil if it did not have a preference for it. State the conclusions you arrived at by conducting the statistical analysis. Information is on attached excel sheet. Own Nest vs. Foreign Nest: positive ranks = 5 (smaller) negative ranks = 10 T.05, n = 5 0.6 Since the results of the Wilcoxon Signed Rank Test are not significant (the sum of the positive rank test is larger than the value for T.05), we fail to reject the null hypothesis which states that the ants cannot distinguish between their own nest soil and foreign soil. Own Nest vs. Non-Nest: positive ranks = 6 (smaller) negative ranks = 9 T.05, n = 5 0.6 Since the results of the Wilcoxon Signed Rank Test are not significant (the sum of the positive rank test is larger than the T value for T.05), we fail to reject the null hypothesis which states that the ants cannot distinguish between their own nest soil and non-nest soil. 2.

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Ex11_S11-Analysis - Group Members_Exercise_Date LI Unique...

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