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What does the 90th percentile represent in a dataset?

easy📝 Conceptual Q11 of 15
SciPy - Statistical Functions (scipy.stats) Basics
What does the 90th percentile represent in a dataset?
AThe average of the top 90% of data
BThe value below which 90% of the data falls
CThe value above which 90% of the data falls
DThe middle value of the dataset
Step-by-Step Solution
Solution:

  1. Step 1: Understand percentile definition

    A percentile indicates the value below which a given percentage of observations fall.

  2. Step 2: Apply to 90th percentile

    The 90th percentile means 90% of data points are below this value.

  3. Final Answer:

    The value below which 90% of the data falls -> Option B

  4. Quick Check:

    Percentile = value below % data [OK]
Quick Trick: Percentile = value below that percent of data [OK]
Common Mistakes:
MISTAKES
  • Confusing percentile with average
  • Thinking percentile is value above percentage
  • Mixing percentile with median

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