Question

HELP PLEASE!! Your company is interested in using a new, faster method to determine copper concentration in aqueous solutions. Before implementing the new method you must check it out to see if it is sufficiently accurate and precise. You also want to know how well the new method compares to the old method. To test the new method you obtain a lake water SRM that is certified to contain 0.0239 ± 0.0002 ppm copper and analyze it by both methods with the following results:

Copper concentration (ppm)
Old Method	New Method
0.0235	0.0233
0.0240	0.0231
0.0239	0.0233
0.0236	0.0232
0.0240	0.0231

What can you say about the new method? Is it as good as the old? Is it better? Do the two methods yield essentially the same results? Is it sufficiently accurate to warrant changing to the new method? Back up your responses with statistical calculations.

Answer 1