Merging SAS Data Sets

Match-Merge Processing

In the output data set illustrated in part below, what caused the missing value for Age in the observation for Jaffe?

Name Sex Age Weight Jones M 48 128.6 Laverne M 58 158.3 Jaffe F    .  115.5 Wilson M 28 170.1
	a missing value for Age in an observation in one of the input data sets
	an unmatched observation in one of the input data sets
	not enough information is provided to determine the cause

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