What does 'Statistically Significant' mean
The likelihood that a result or relationship is caused by something other than mere random chance. Statistical hypothesis testing is traditionally employed to determine if a result is statistically significant or not. This provides a "pvalue" representing the probability that random chance could explain the result. In general, a 5% or lower pvalue is considered to be statistically significant.
BREAKING DOWN 'Statistically Significant'
This concept may sound confusing and impractical, but consider a simple example  suppose you work for a company that produces running shoes:
You need to plan production for the number of pairs of shoes your company should make in each size for men and for women. You don't want to base your production plans on the anecdotal evidence that men usually have bigger feet than women, you need hard data to base your plans on. Therefore, you should look at a statistical study that shows the correlation between gender and foot size.
If the report's pvalue was only 2%, this would be a statistically significant result. You could reasonably use the study's data to prepare your company's production plans, because the 2% pvalue indicates there is only a 2% chance that the connection between foot size and gender was the result of chance/error. On the other hand, if the pvalue was 20%, it would not be reasonable to use the study as a basis for your production plans, since there would be a 20% chance that the relationship presented in the study could be due to random chance alone.

PValue
The level of marginal significance within a statistical hypothesis ... 
Statistical Significance
A result that is not likely to occur randomly, but rather is ... 
Random Factor Analysis
A statistical analysis performed to determine the origin of random ... 
Runs Test
A statistical procedure that examines whether a string of data ... 
Simple Random Sample
A subset of a statistical population in which each member of ... 
Null Hypothesis
A type of hypothesis used in statistics that proposes that no ...

Investing
How Statistical Significance is Determined
If something is statistically significant, itâ€™s unlikely that it happened by chance. 
Trading
Hypothesis Testing in Finance: Concept & Examples
When you're indecisive about an investment, the best way to keep a cool head might be test various hypotheses using the most relevant statistics. 
Trading
Understanding Statistics
Statistics provide the means to analyze data and then summarize it into a numerical form. 
Markets
Understanding the Simple Random Sample
A simple random sample is a subset of a statistical population in which each member of the subset has an equal probability of being chosen. 
Investing
What Are The Odds Of Scoring A Winning Trade?
Just because you're on a winning streak doesn't mean you're a skilled trader. Find out why. 
Markets
Can Investors Trust Official Statistics?
The official statistics in some countries need to be taken with a grain of salt. Find out why you should be skeptical. 
Markets
Financial Markets: Random, Cyclical Or Both?
Are the markets random or cyclical? It depends on who you ask. Here, we go over both sides of the argument. 
Trading
Random Reinforcement: Why Most Traders Fail
This phenomenon can cause a trader to abandon a proven strategy or risk everything on chance. Find out how to avoid it. 
Trading
Viewing The Market As Organized Chaos
Find out how a cat and a ladybug prove markets are both random and efficient. 
Retirement
5 Reasons to Leave Retirement Planning to Your Wife
Wives live longer than their husbands, so their retirement stakes are higher. Luckily, certain qualities make women especially good at longterm planning

What is the "random walk theory" and what does it mean for investors?
The random walk theory is the occurrence of an event determined by a series of random movements  in other words, events ... Read Answer >> 
What are the best selection methods for creating a simple random sample?
Discover some of the methods that researchers and pollsters utilize to select a simple random sample from a population group ... Read Answer >> 
How do researchers ensure that a simple random sample is an accurate representation ...
Learn which methods researchers employ to ensure that a simple random sample best approximates the larger population being ... Read Answer >> 
What are the advantages of using a simple random sample to study a larger population?
Learn how simple random sampling works and what advantages it offers over other sampling methods when selecting a research ... Read Answer >> 
What is the criteria for a simple random sample?
Discover the criterion for taking a simple random sample, in contrast to a systematic random sample, each person selected ... Read Answer >> 
What are the disadvantages of using a simple random sample to approximate a larger ...
Learn what a simple random sample is, how researchers use it as a statistical tool and the disadvantages it carries when ... Read Answer >>