Scientific Thinking (Week 4 and 5)

Scientific Thinking (Week 4 and 5)

1. What are the essence of a good scientific investigation

   • Results / Data Collection should be OBJECTIVE
     • It should be objective and measurable/ quantifiable
       • Quantifiable : - To determine, indicate, or express the quantity of something To give quantity to (something regarded as having only quality)
     • Measurement is not based on the opinion of the on ducting the investigation
       • Example
         • "He is very tall" = SUBJECTIVE ---------------------- "His height is 1.9m" = OBJECTIVE & QUANTIFIABLE
   • VALID
     • Measurement is valid in assessing the quality
       • Example
         • "To assess a lecturer's ability to teach" ----------------------------- -Cannot be based on the number of classes he teaches. -Should be based on the survey score from his students.
   • Sample size of the test/data should be SUFFICIENT
     • How many is sufficient?
       • Depends on how reliable you want your test to be
       • Bigger sample = Smaller Error
       • Guideline for your project
         • Sample size of > 30