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Confidence Interval Calculator (using t-distribution)

Confidence Interval Calculator (using t-distribution)
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2018-12-08 13:13
CalculusProbability & StatisticsGraphing
This example demonstrates how to calculate sample mean confidence intervals using the t-distribution. It involves core math concepts like t-distribution, confidence intervals, sample mean, and sample standard deviation. Constructed with GeoGebra commands and objects such as Normal, InverseTDistribution, Integral, Segment, and Textfield. Suitable for high school students and teachers for learning and teaching demonstrations.

GeoGebra Commands & Parameters

  1. Normal(samplemean, samplesd / samplesize^(0.5), x) → f
  2. InverseTDistribution(samplesize - 1, (1 - (0.01 * confidence)) / 2) → b
  3. Integral(f, x(B), x(A)) → e
  4. Integral(f, -1.0E99, x(B)) → g
  5. Integral(f, x(A), 1.0E99) → h
  6. Segment(A, D) → c
  7. Segment(B, C) → d
  8. Textfield(samplemean) → inputBox1
  9. Textfield(samplesd) → inputBox2
  10. Textfield(samplesize) → inputBox3
  11. Textfield(confidence) → inputBox4