24. Probability of committing type I error and how to avoid it...
What is the probability of committing type I
Is normally designated by the lowercase Greek letter a (alpha) - another possible mistake is failing to reject a null hypothesis that is false The probability of a Type I Error in hypothesis testing is predetermined by the significance level. The power of a hypothesis test is nothing more than 1 minus the probability of a Type II error.
What is the probability of committing type II
Is normally designated with the lowercase Greek letter beta The probability of committing a type II error is equal to 1 minus the p-value, also known as beta.
How to avoid type 2 error
The power of the test could be increased by increasing the sample size, which decreases the risk of committing a type II error.
How to avoid type 1 error
requiring a smaller p-value for rejecting the null hypothesis