Problem

Compare sampling only morning customers with randomly sampling customers throughout the day. State the plan that gives better inference about the full customer population and explain why.

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Both plans give about the same inference quality because each samples customers from the same store, so the time of day should not matter much.

Sampling only morning customers gives better inference because those are still real customers, so that sample should represent the whole customer population well enough.

Sampling only morning customers gives better inference because focusing on one time period makes the sample more consistent and therefore less biased.

Randomly sampling customers all day gives better inference because it covers more of the full customer population and is less likely to miss groups who come later.

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Compare sampling only morning customers with randomly sampling customers throughout the day. State the plan that gives better inference about the full customer population and explain why.

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