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How science works
Transcript of How science works
-Draw line of best fit if possible
-Evaluate methodology and validity of results - precision, accuracy, reliability -Correlation does not prove causation
-Ensure all errors have been mitigated
-Work is always still open to scrutiny from outside sources Precision -Use smaller increments on measuring equipment
-Reduces percentage error
error/ value= +/- maximum error Plotting graphs -If both independent and dependent are continous
data, use a dot plot line graph
-If one or more of variables is catagoric, use a bar chart
-If independent variables can not be interconnected, seperate out bar's from one another Examples:
-Placebo use (control group)
-Double blind trial
-Ensuring all are treated the same
-Large samples to mitigate
- allows for chance in statistical
tests Random science notes Make this something about biology ;-) Hi Ms Clark/ Mr Kent Brainstorming Results Realisation Controls With Experiments:
-Evaluation Accuracy Get another body to do same test independently
and compare results
Do test in a different way and compare the results Variables independent dependent control Evaluation value for each measured change in the independent variable variable changed by investigator control variables - must be kept constant for all tests in experiment -if not kept constant, will effect/ bias the results of the experiment -errors resulting from a failure to control certain variables can be noted as:
(-random errors) How could test have been improved:
all equate to validity of results -Present data (graph)
-Any correlation between independent and dependent variable.
-How do results fit hypothesis Reliability Repeat tests atleast 3+ times
and work out average
(usually mean average)
redo any anomalous results