4.1.8 Qulz: Using Data to Make Inferences Queation 7 of 10 Which option is an example of a survey? A. Testing the effectiveness of a mouthwash by allowing one group to use in and comparing the results with those of a group that doesn't use it B. Finding the number of red jellybeans in an average jar of jellybeans by counting C. Placing different groups of people in different colored rooms and recording their mood D. Having customers fill out a questionnaire about their favorite brand of toothpaste

Surveys have a rich history dating back to ancient civilizations where rulers would often gather data from their subjects to make decisions. The word "survey" comes from the French word "surveier," meaning "to look over." In modern times, surveys have evolved into sophisticated tools used in various fields, from marketing to social sciences, enabling organizations to gather insights from large populations. In the real world, surveys are incredibly valuable! Businesses often use customer feedback surveys to gauge satisfaction and improve their services or products. For example, a restaurant may distribute a quick survey on diners’ experiences to identify areas for improvement or celebrate successes. Engaging customers in this way can foster loyalty and increase revenue in the long run!