Two water samples were analyzed for their copper content byatomic absorption spectroscopy. After 5 replicate analyses, thefirst water sample was found to have 12.6± 0.9 mg/L copper. After 6replicate analyses, the second water sample was found to have 13.1±0.6 mg/L copper. Is the copper content in these water samplessignificantly different? Report your answer in a full sentence,including all necessary information to explain how confident youare about your answer.
Answer: Since the calculated t value is less than thetabulated value (95%, 9 degrees of freedom, tcalc = 0.6, ttable =2.3) , the two copper concentrations are not statisticallydifferent to 95% confidence.
Can you show me how he got to that answer?
