Type II

• What is a Type II error?

  When a psychologist rejects the experimental hypothesis (so accepts the null hypothesis)
• Describe type 11 error?

  In reality there WAS A SIGNIFICANT relationship/difference between what was being investigated so they should have accepted the experimental hypothesis but did NOT
• When could Type II errors happen?

  When you run your statistical test using a significance level that is TOO STRINGENT eg p<0.01 or the 1% level

  • Essentially only allowing for 1% of the time your results being down to chance to achieve statistical significance