Question

How do you know if a relationship is statistically significant? What statistic would you look at and what would the value be?

Answer 1

A relationship is said to be statistically significant when the relationship between two or more variables under study is caused by factors other than chance. Statistical hypothesis testing is used to find out whether the results are statistically significant or not. The researcher calculates the p-value to determine what is the likelihood of a given result to occur more than 0.05 or 0.01 times. P-value is the probability of observing an extreme effect given that the null hypothesis is true and the researcher rejects the null hypothesis if the probability value is less than the level of significance. The results are said to statistically significant if the probability of getting an extrem value is less given the null hypothesis about no difference is true.