Do consumers spend more on a trip to Walmart or Target? Suppose researchers interested in this question collected a systematic sample from 85 Walmart customers and 80 Target customers by asking customers for their purchase amount as they left the stores. The data collected are summarized in the table below.

To perform inference on these two samples, what conditions must be met? Are they? Explain

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Walmart Target 80 y $45 $53 $21 $19 85