Null hypothesis vs. hypothesis, which is the right choice? When you get into the different methods of analyzing data, there is no shortage of tools at your disposal. Understanding the difference ...

The key differences between a paired and unpaired t-test are summarized below. A paired t-test is designed to compare the means of the same group or item under two separate scenarios. An unpaired ...

The alternative hypothesis above does not specify a direction of the effect, only that there will be a difference between the two groups. That type of prediction is called a two-tailed hypothesis.

As therapists, our job is use facts, hypothesis, observations, and assumptions in our sessions. The art is to know the difference between them, know when to focus on each one, and find a way to ...

Words like “fact,” “theory,” and “law,” get thrown around a lot. When it comes to science, however, they mean something very specific; and knowing the difference between them can help ...

I applaud Edward Kimball's explanation of the difference between assumption and hypothesis (May 25), but I think his narrative concerning theory warrants some comment. Hypotheses are not and ...