State the factors that affect power and what factors we have to specify to do a sample size calculation. Some notes on the behaviour of sample size calculations and power for unequal group sizes This ...

Key Points Variable data is data that is measured. It can be derived from anything that you measure within your processes. It ...

Key Points Random sampling is a random means of gathering data points from all groups. It eliminates bias within your data ...

Mortgage refi rates have fallen for a second day, lowering the 30-year average to its cheapest level since mid-October. Most ...

Analysis: Even in a close election, random chance means polls should be showing a broader range of results. That raises the ...

Cy-Fair ISD won’t pursue eliminating K-level classes and changing GPA ranking rules, but the board could still vote to remove ...

Mortgage refi rates inched a bit lower Tuesday, coming down from their most expensive level in nearly three months. Rates ...

In the current election cycle, many media reports about polls are not including information about the margin of error.

Cassava Sciences' RETHINK-ALZ trial is nearing data release. See why SAVA stock could see volatility depending on trial ...

Superconductivity is the phenomenon by which, at sufficiently low temperatures, electric current can flow in a metal with no ...

In MLB's own calculation on Statcast ... Crow-Armstrong’s exclusion may largely be due to timing and sample size. While his defensive impact was immediate, his mid-season call-up to Chicago ...