probavility levels

• P<0.1 99% due to manipulation 1% due to chance (stringent)

  Vulnerable to type ii 2 error (null hypothesis is accepted when it should be rejected. Often used for sensitive topics
• P<.05 95% due to manipulation 5% due to chance (acceptable)

  Less chance of making a type I or type ii error
• P<.10 90% due to manipulation 10% due to chance (lenient)

  Vulnerable to a type I (1) error (null hypothesis is rejected when it should have been accepted)