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Data Handling & Analysis ZO4030 2012-2013 Andrew Jackson

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Presentation on theme: "Data Handling & Analysis ZO4030 2012-2013 Andrew Jackson"— Presentation transcript:

1 Data Handling & Analysis ZO4030 2012-2013 Andrew Jackson a.jackson@tcd.ie

2 Basic Data Organisation Use Excel to input and organise your data Each row is a different observation speciesclassbrain body New Caledonian CrowAves7.5277 Emperor PenguinAves46.228000 Little PenguinAves7.4960 African elephantMammalia60005000000 Bottlenose DolphinMammalia1700160000

3 Propose an hypothesis That the mass of brains of mammals (Mammalia) are different to the brains of birds (Aves) – Identify the Response Variable – Identify the Explanatory Variable(s) speciesclassbrain body New Caledonian CrowAves7.5277 Emperor PenguinAves46.228000 Little PenguinAves7.4960 African elephantMammalia60005000000 Bottlenose DolphinMammalia1700160000

4 Calculate new response variable speciesclassbrain bodyratio New Caledonian CrowAves7.52770.027076 Emperor PenguinAves46.2280000.00165 Little PenguinAves7.49600.007708 TurkeyAves755000.001273 MagpieAves5.32150.024651 PigeonAves23000.006667 RavanAves1512000.0125 MallardAves5.812520.004633 JaguarMammalia1571000000.00157 Rhesus monkeyMammalia17968000.026324 Golden hamsterMammalia11200.008333 Grey wolfMammalia119.5363300.003289 Response VariableExplanatory Variable

5 How will we plot these data? AvesMammalia Brain / body mass ratio

6 Questions Biological question – Does brain size differ between birds and mammals? Data question – Is the mean ratio of brain to body mass different between the birds and mammals?


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