Two chemists conducted replicate sets of mercury determinations on an analytical sample. The results, measured in parts per billion (ppb) or micrograms per liter (g/L)

• Two chemists conducted replicate sets of mercury determinations on an analytical sample. The results, measured in parts per billion (ppb) or micrograms per liter (μg/L) for mercury (Hg), are as follows: Chemist 1 obtained values of 10.14, 10.12, 10.04, and 10.07 ppb, while Chemist 2 obtained values of 10.19, 10.11, 10.15, and 10.12 ppb. It is assumed that the data are normally distributed. a. State the appropriate hypothesis. b. Do the chemists differ at the 95% confidence level? At 95% CL, tcrit = 2.447.