Statistics for Quantitative Analysis
 

•Statistics:  Set of mathematical tools used to describe and make judgments about data

•Type of statistics we will talk about in this class has important assumption associated with it:

 

Experimental variation in the population from which samples are drawn has a normal (Gaussian, bell-shaped) distribution.

 

  - Parametric vs. non-parametric statistics

 Normal distribution

 •Infinite members of group:  population

• Characterize population by taking samples

• The larger the number of samples, the closer the distribution becomes to normal

• Equation of normal distribution:  

 

 

 

 Normal distribution

•

•Estimate of mean value of population = m

•Estimate of mean value of samples =

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•  Mean =