Water and other nonaqueous volatiles are present in differing concentrations in coal from different seams. To measure the percentage by weight of these substances for a particular seam, readings are taken at two different temperatures. These data result: Nonaqueous volatiles (a) Use the water data to testH0:μ1=μ2H1:μ1î =μ2at theα=.05level. Does the temperature at which the readings are taken appear to affect the mean reading of the water concentration of the coal? Explain. Be ready to defend your choice of a test statistic. (b) Use the nonaqueous volatiles data to testH0:μ1=μ2H1:μ1î =μ2at theα=.05level. Does the temperature at which the readings are taken appear to affect the mean reading of the concentration of nonaqueous volatiles in the coal? Explain.