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Independent t-test sample size

To ensure a test is useful and likely to report accurate results as determined by an expected power and effect size, a minimum sample size must be collected. Various tests use different functions to derive the sample size needed to be collected.

You are planning to assess whether the mean time students spend on social media varies with the technology used for class during COVID. To ensure you obtain enough data for your A/B test, determine the sample size needed to achieve the values you expect.

Este exercício faz parte do curso

A/B Testing in R

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Instruções do exercício

  • Load the pwr package.
  • Determine the sample size needed with an expected effect size of 0.90 and power of 0.80 with an alpha of 0.05 for a two-tailed independent t-test.

Exercício interativo prático

Experimente este exercício completando este código de exemplo.

# Load the pwr package
___

# Determine the sample size needed
pwr.t.test(d = ___, power = ___, 
           sig.level = ___, 
           type = ___)
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