The 41 numbers in Table 10.6 are average sulfur dioxide contents over the years 196971 (micrograms per

Question:

The 41 numbers in Table 10.6 are average sulfur dioxide contents over the years 1969€“71 (micrograms per cubic meter) measured in the air in 41 U.S. cities. The data appear on pp. 619€“620 of Sokal and Rohlf (1981).
a. Test the null hypothesis that these data arise from a normal distribution.
b. Test the null hypothesis that these data arise from a lognormal distribution.
Table 10.6 Sulfur dioxide in the air of 41 U.S. cities