Developing a Stratified Sampling Scheme

00:00 4 marks

A research team is tasked with conducting a customer satisfaction survey for a large retail store. To ensure fair representation across different age groups, they opt for stratified sampling. The customer base is categorized into three age strata: under 25 years, 25-45 years, and over 45 years. According to store records, these strata constitute 20%, 50%, and 30% of the total customer population, respectively. Using proportional allocation, calculate the number of customers to be surveyed from each age stratum to achieve a total sample size of 300.

Hint Hint

Hint

To ensure proportional representation, determine the sample size for each stratum by multiplying the total desired sample size by the proportion of customers in that stratum.

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Answer Answer

Complete Answer

Under 25: 60 samples, 25-45: 150 samples, Over 45: 90 samples

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