research methods

• what is a type one error?


  when they accept the alternative when it should be rejected
• what is a type two error?


  when they reject the alternative when it should be accepted.
• why do type one errors happen?


  this is due to the significance level not being stringent enough - e.g. 0.5
• why do type two errors happen?


  this is due to the significance levels being too stringent - e.g. 0.01