How to select an appropriate statistical method 

1. Read the problem carefully and determine:

• The population of interest
• If the sample is random or not
• Variable(s) of interest and scale of data (quantitative if MEASUREMENT, qualitative if COUNT DATA)
• If the problem involves estimating or testing the MEAN or PROPORTION, if you are given 1 sample, 2 samples, or more then 2 samples.
• If the problem involves building a model for a RESPONSE VARIABLE in terms of PREDICTOR VARIABLES

2. Decide upon a suitable statistical method to answer the question(s).

 A detailed PDF manual is  a valiable underneath the chart.

PDF Manual on choosing your statistical method