To measure satisfaction with its cell phone service, AT&T takes a stratified sample of its customers by age, gender, and location. Which is an advantage of this type of sampling, as opposed to other sampling methods?
A)It is less intrusive on customers' privacy.
B)It does not require random numbers.
C)It gives faster results.
D)It can give more accurate results.

Question

Quizplus · Accepted Answer

Stratified sampling allows for a more representative sample by ensuring that each stratum (age, gender, location) is proportionally represented in the sample. This can lead to more accurate results, as opposed to other methods such as convenience sampling or simple random sampling.

To Measure Satisfaction with Its Cell Phone Service, AT&T Takes