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Answer the standard five questions for each of the following experiments. (a) We are interested in the relationship between atmospheric sulfate aero- sol concentration and visibility. As a preliminary to this study, we examine how we will measure sulfate aerosol Sulfate aerosol is mea- sured by drawing a fixed volume of air through a filter and then chem- ically analyzing the filter for sulfate. There are four brands of filter available and two methods to analyze the filters chemically. We ran- domly select eight filters for each brand-method combination. These 64 filters are then used by drawing a volume of air with a known con- centration of sulfate through the filter), split in half, and both halves are chemically analyzed with whatever method was assigned to the filter, for a total of 128 responses. (6) A research group often uses six contract analytical laboratories to de termine total nitrogen in plant tissues. However, there is a possibility that some labs are biased with respect to the others. Forty-two tissue samples are taken at random from the freezer and split at random into six groups of seven, one group for each lab. Each lab then makes two measurements on each of the seven samples they receive, for a total of 84 measurements. (c) A research group often uses six contract analytical laboratories to de- termine total nitrogen in plant tissues. However, there is a possibility that some labs are biased with respect to the others. Seven tissue sam- ples are taken at random from the freezer and each is split into six parts, one part for each lab. We expect some variation among the subsamples of a given sample. Each lab then makes two measurements on each of the seven samples they receive for a total of 84 measurements. Answer the standard five questions for each of the following experiments. (a) We are interested in the relationship between atmospheric sulfate aero- sol concentration and visibility. As a preliminary to this study, we examine how we will measure sulfate aerosol Sulfate aerosol is mea- sured by drawing a fixed volume of air through a filter and then chem- ically analyzing the filter for sulfate. There are four brands of filter available and two methods to analyze the filters chemically. We ran- domly select eight filters for each brand-method combination. These 64 filters are then used by drawing a volume of air with a known con- centration of sulfate through the filter), split in half, and both halves are chemically analyzed with whatever method was assigned to the filter, for a total of 128 responses. (6) A research group often uses six contract analytical laboratories to de termine total nitrogen in plant tissues. However, there is a possibility that some labs are biased with respect to the others. Forty-two tissue samples are taken at random from the freezer and split at random into six groups of seven, one group for each lab. Each lab then makes two measurements on each of the seven samples they receive, for a total of 84 measurements. (c) A research group often uses six contract analytical laboratories to de- termine total nitrogen in plant tissues. However, there is a possibility that some labs are biased with respect to the others. Seven tissue sam- ples are taken at random from the freezer and each is split into six parts, one part for each lab. We expect some variation among the subsamples of a given sample. Each lab then makes two measurements on each of the seven samples they receive for a total of 84 measurements