Statistical Power and t-test
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Questions and Answers

What is the null hypothesis (H0) in hypothesis testing?

  • The hypothesis that there is no effect/difference (correct)
  • The hypothesis that the alternative hypothesis is true
  • The probability of obtaining a test statistic
  • The hypothesis that there is an effect/difference

    • What does a small p-value indicate in hypothesis testing?

  • The test result fits the reality
  • The alternative hypothesis is probably wrong
  • The null hypothesis is true
  • The null hypothesis is probably wrong (correct)

    • What does a false positive ("Type I error") in statistical testing refer to?

  • The null hypothesis H0 is in fact true, but we reject it in favor of H1 (correct)
  • The test result fits the reality
  • The alternative hypothesis H1 is in fact true, but we don’t reject H0
  • The probability of obtaining a test statistic

    • What is the major goal of hypothesis testing?

    <p>To control Type I and Type II errors</p> Signup and view all the answers

    What is the probability of obtaining a test statistic at least as extreme as the one observed, if the null hypothesis is true?

    <p>p-value</p> Signup and view all the answers

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