in statistics, refers to the probability of arriving at a false negative. As such, a person will make the wrong move of retaining the null hypothesis, thus, failing to reject it.

Failing proabability in rejecting the null hypothesis even when it is false and causing a type II error.

The probability of making an error when comparing groups and stating that differences between the groups are the result of the chance variations when in reality the differences are the result of the e [..]