A chi-square (χ2) statistic is a test that is used to measure how expectations compare to actual observed data or model ...

Janette Novak is a freelance journalist and consultant who specializes in teaching online business and small business marketing. Previously, Janette owned a boutique marketing agency and served as a ...

If you had to do a test, how would you respond? Would you relish the chance to demonstrate your knowledge? Or worry you were about to fall short of the mark and embarrass yourself? Subscribe to our ...

A common data logging application is measuring voltage or current flowing into or out of a piece of equipment, such as a user monitoring current in solar cells, inverters, or storage batteries. These ...

A blood test for more than 50 types of cancer could help speed up diagnosis, according to a new study. Results of a trial in ...