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# Biostatistics: A Summary of the Methods and Terms Used Accor

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## Garrick Ng

on 19 July 2016

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#### Transcript of Biostatistics: A Summary of the Methods and Terms Used Accor

Biostatistics
A Summary of the Methods and Terms Used According to the 6 Assessment Objectives
Correlation vs Causation
Thank you for listening :) !
But wait.....
What is statistics?
Statistics
: a branch of mathematics dealing with the collection, analysis, interpretation, and presentation of masses of numerical data

-In relation to Biology, statistics allows us to use small samples from the environment, like animal populations and ecosystems, and make generalizations and conclusions about the whole population or community in general.

Correlation
Causation
Error Bars
indicate how variable a set of data is. They can either show the range or the standard deviation given one or more data sets.
Mean
is essentially the average of values given a data set. It is used mostly to compare whether or not a data set is generally greater than or less than the values of another data set.
Standard Deviation
is essentially the spread of values around the mean. In a normal distribution, 68% of the values lie within + or - 1 standard deviation from the mean. Normally, the standard deviation will be represented graphically by a bell curve.

T-Test
is essentially used to determine the significance of the difference between two sets of data. It determines whether or not the difference between two data sets could be produced by chance alone. Scientists usually settle for differences that have a percentage less than 5% chance that mere luck could produce the results on its own.
What is a bell curve?
Bell Curve
a graph with a large rounded peak tapering away at each end.
Results of the T-Test
Degrees of Freedom
is essentially the total number of samples minus 2

Any Questions?
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