sydneylove3573 sydneylove3573

28-08-2018
Social Studies

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A public health research wants to determine the average blood lead concentration for children in elementary school (grades k through 5), but has reason to believe the concentration may differ among neighborhoods where predominantly lower, middle, and upper socio-economic class populations live. select the most appropriate sampling or experimental study design for the above situation.

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ahmedishaal ahmedishaal

08-09-2018

The most appropriate sampling for this would be "stratified sampling".

Stratified sampling alludes to a kind of testing technique. With stratified sampling, the investigator partitions the populace into discrete gatherings, called strata. At that point, a probability test is drawn from each gathering. Stratified sampling has a few favorable circumstances over simple random sampling. For instance, utilizing stratified sampling, it might be conceivable to decrease the sample size required to accomplish a given accuracy. Or on the other hand it might be conceivable to increase the accuracy with a similar sample size.

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