what are the tools for statistically testing a hypothesis?

Question

what is the most likely tool for analyzing data gathered through a questionnaire?

Answer 1

It depends on the types of questions on the survey. The first step would be a summary which would be min,max,mean, median for each question that has a numerical answer. For yes/no answers then just the fraction of each.

Histograms are a good way to present such summaries.

Wait, you asked about a hypothesis! The tools used would depend on the nature of the populations being sampled, the type of data, and the nature of your hypothesis.

If you'd hypothsized that the data has a certain distribution then you'd be doing a goodness of fit test on the parameters of the distribution.