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What is the most common/popular genre to buy at a record store?

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We went to 5 different record stores and recorded data over the course of a week.

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The stores we used were the 2 Zia's Record locations, The Record Room, and Crates Records

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We asked the different stores to place certain genres of music at the front of the store over one week.

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The explanatory variable is placing different genres at the front of the store.

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The response variable is which genre collectively made more sales.

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For randomisation, we made sure each store was doing a different genre each day to avoid overlap. For lurking variables, it is possible that people don't purchase records of the recorded genres.

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Each store is its own control.

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This a blind experiment because the customers don't know they are being tested but the stores obviously do.

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This is a crossover study because each store is doing something different thing every day.

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We are only using 4 stores so our margin of error is very small.

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This experiment could be easily replicated. In the future, it might be easier if we used more stores.

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It can be shown that the second Zia's location was the most popular, and that rock albums sold the most.

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We didn't really spend much money, but we did buy a record from each store as a small compensation.
$25 x 4= $100

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we learned that across the city, most people prefer rock records, as can be seen in our results.