Skills Flashcards
What do you look for when analyzing data?
- SDs overlap
- range
- exponential?
- positive correlation?
What makes an experiment valid?
- large sample size SO representative
- length of time for redistribution/growth etc
- control for comparison
What things could allow hibernation?
- fat as insulation so reduced heat loss
- fat store used in metabolism
- water provided from respiration
What does an overlap between standard deviations show?
no significance in the results/difference
What type of animals have a larger SA:V ratio?
smaller animals
What for arguments do you consider when evaluating conclusions?
- does the data agree
- use SDs if applicable
What against arguments do you consider when evaluating conclusions?
- environment, eg lab vs natural
- other factors closely related
- are there stats tests, do they show findings are significant
- concentration/volumes used
- sample size
What environmental factors should be controlled in biological investigations?
- temperature
- O2/Glucose concentration
- light/wind intensity
- pH
What other, non-environmental factors should be controlled in biological investigations?
- species
- surface area/size of sample
- time
Why might a logarithmic scale be used on a graph?
if there is a wide range of values
Describe 4 features of a good scientific drawing…
- does not use shading
- single lines
- has scale bar
- annotations
How do you set up a control experiment?
- remove one factor (eg, denatured enzymes)
- keep control variables the same
When would the median be a preferred average to use?
when outliers are present
What test is used to compare two means?
Student’s t-test
