P56StatisticsBeginnerCalculate5 min
Calculate a Weighted Average Rating Across Product Lines
Combine segment ratings using their sample sizes.
#calculate#weighted-average#ratings
Scenario
Product A has average rating 4.8 from 20 reviews; Product B has 3.6 from 80 reviews.
Problem statement
Calculate the overall rating.
Your Task
- Compute weighted rating points.
- Divide by all reviews.
- Explain why averaging 4.8 and 3.6 is wrong.
Related Concepts
Weighted meansSample sizeAggregation
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