1. You and your lab partner independently determine the concentration of Ca2+ in a water sample. The results are:
You Lab partner
350 ppm ppm
345 ppm ppm
342 ppm ppm
348 ppm ppm
Calculate the average and 95% confidence interval for each set of data. Report correctly.
you: ± 6ppm partner: 338± 5ppm
Are each set of results statistically the same at the 95% confidence level?
t calc = 3.31 > t table = 2.447, therefore not statistically the same
From this analysis, can you tell who is correct? No