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Overrated

How much should you trust online ratings?

How much should you trust online ratings? When you’re shopping for items online, it can be hard to know which to buy. Star ratings are a helpful way to quickly compare products, but they can also be misleading.

In this lesson, students use mean, median, and mode to analyze the trustworthiness of 5-star rating systems and suggest ways to make them more reliable.

REAL WORLD TAKEAWAYS

• When there is a small number of reviews the next review has a bigger impact on the mean than with larger numbers.
• Plenty of online reviews are fake.
• More reviews might be better to rely on than a small number.

MATH OBJECTIVES

• Calculate mean, median, and mode and compare the appropriateness in context

Appropriate most times as students are developing conceptual understanding.