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IIBA Exam CBDA Topic 1 Question 13 Discussion

Actual exam question for IIBA's CBDA exam
Question #: 13
Topic #: 1
[All CBDA Questions]

An organization's customers are categorized based on the amount of purchases completed over the last 12 months. The analytics team would like to ensure the accuracy of their survey results and decide to randomly select 500 customers to participate in a survey from this large pool of customers. This is an example of:

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Suggested Answer: B

The Gaussian distribution, also known as the normal distribution, is a probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean. In graph form, the Gaussian distribution will appear as a bell curve, which is the case with option A. It is characterized by its bell-shaped curve and is defined by the mean () and the standard deviation (). It is a common assumption for the distribution of independent, randomly generated variables.


Contribute your Thoughts:

Cheryl
20 hours ago
I'm not sure, but I think it might be C) Purposive sampling. It sounds like they have a specific purpose in mind for selecting those customers.
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Doretha
3 days ago
I agree with Johnson. Stratified sampling ensures representation from different customer categories.
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Johnson
9 days ago
I think the answer is A) Stratified sampling.
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