A research marketer is interested in collecting information about the spending habits of families in North America. Concerned about the volume of data required to conduct the research, they choose to use sampling. The dataset is sourced using all credit card transactions from a leading North American credit card company for Quarter 1 of the prior year.
The sample used is:
The sample is biased. Using all credit card transactions from a leading North American credit card company may not accurately reflect the spending habits of all families in North America. Different families may prefer using different payment methods or credit card companies, meaning this sample could exclude those who do not use this particular company's credit card. As a result, the data may be skewed and not entirely representative of the entire population.
The sample may be biased because it relies on transactions from a single credit card company, potentially leading to skewed results that do not accurately reflect the spending habits of all families in North America. See pg 104 - 3.2 Bss Visualizations - Present unbiased analysis