pags related info for exams

• what the benefit of repeating the experiments?

  • reduce the impact of anomolous results
  • the mean is likely more accurate than and individual value
• What precautions should you take when dealing with biological material?(4)

  wear gloves/apron

  responsible dispose of the material

  Cut away from your body

  Wash your hands thoroughly after handling]=
• When is it appropriate to use and why is the Chi squared test used?

  The chi squared test is used to test if the obtained result is too different from the expected results ( a measure of variance ).

  The difference is caused by chance but if the difference is large and the probability is very unlikely then there would be evidence suggesting that there is a another factor involved in ____ process.