Data Sampling Quiz

Quiz covering Data Quality

Questions in this quiz

A preview of the 5 questions covered. Start the quiz above to answer them, check your score, and read the explanations.

1. 1

   Which of the following best describes the primary purpose of data sampling in a data quality assessment?

2. 2

   When performing stratified random sampling on a customer database to check for address accuracy, why would you choose to stratify by 'Geographic Region'?

3. 3

   You are auditing a dataset of 1 million transaction records. You select every 100th record to evaluate for missing values. What type of sampling method are you using?

4. 4

   What is the primary risk of using 'Convenience Sampling' when assessing the data quality of a global customer CRM system?

5. 5

   You need to determine the minimum sample size for a quality audit of a production database with 500,000 records. You require a 95% confidence level and a 5% margin of error. If the population proportion of errors is unknown, which assumption should you make to ensure the most conservative (largest) sample size?