What is food survey?

Descriptive Statistics and the Normal Distribution

Statistics has become the universal language of the sciences, and data analysis can lead to powerful results. As scientists, researchers, and managers working in the natural resources sector, we all rely on statistical analysis to help us answer the questions that arise in the populations we manage. For example:

  • Has there been a significant change in the mean sawtimber volume in the red pine stands?
  • Has there been an increase in the number of invasive species found in the Great Lakes?
  • What proportion of white tail deer in New Hampshire have weights below the limit considered healthy?
  • Did fertilizer A, B, or C have an effect on the corn yield?

Good statistics come from good samples, and are used to draw conclusions or answer questions about a population. We use sample statistics to estimate population parameters (the truth). So let’s begin there…