Question

a certain store has 3,000 employees working at its main location in a city and 100 employees working at a smaller location outside the city. the store manager will select a sample of 50 employees from all the employees to ask their opinions about extending store hours during the holidays. what is the advantage of selecting a stratified random sample, with location as strata, instead of a simple random sample?
a the stratified sample assures the most random selection from among all selection methods
b the stratified sample assures that the opinions of employees from both locations will be represented.
c the stratified sample will be less expensive to implement than a simple random sample and will save money over time.
d the stratified sample assures employees that store hours will not be extended until their opinions are recorded.
e there is no real advantage to stratifying because a simple random sample is

Explanation:

Stratified random sampling divides the population into strata (here, locations). By doing this with location as strata, it ensures that employees from both the main - city location and the smaller outside - city location are represented in the sample. A simple random sample may not guarantee representation from both groups proportionally.

Answer:

B. The stratified sample assures that the opinions of employees from both locations will be represented.