Statistical Inference · Statistics and Probability

Confidence Intervals

Calculating and interpreting intervals that likely contain the true population mean or proportion.

Key Questions

  1. 1What does a 95 percent confidence level actually mean in terms of repeated sampling?
  2. 2How does increasing the confidence level affect the width of the interval?
  3. 3Why can we never be 100 percent certain about a population parameter based on a sample?

ACARA Content Descriptions

AC9MSM05
Year: Year 12
Subject: Mathematics
Unit: Statistical Inference
Period: Statistics and Probability

Suggested Methodologies

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Sample Proportions

Understanding how sample statistics vary and how they relate to the true population parameter.

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