the basketball players at rafaels middle school are selling t shirts and he wants to determine the average number of shirts that have been sold. first he surveyed five members of the 7th grade boys basketball

the basketball players at rafaels middle school are selling t shirts and he wants to determine the average number of shirts that have been sold. first he surveyed five members of the 7th grade boys basketball team. then he surveyed every third basketball player on the boys and girls 6th through 8th grade basketball teams. which sampling technique should produce a more representative sample?

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