Pearson Correlation Coefficient and Statistical Significance Quiz
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Questions and Answers

What does the Pearson Correlation Coefficient (r) measure?

  • The strength of a linear association between two variables (correct)
  • The difference in means between two groups
  • The proportion mean of a continuous variable
  • The statistical significance of an association

    • What does an r value of -1 or 1 indicate about the association between two variables?

  • Statistically insignificant association
  • Perfect linear association (correct)
  • Weak association
  • No association

    • In the context of measuring association, what does 'null value' refer to?

  • Perfect association between the variables
  • Zero association between the variables (correct)
  • Uncertain association between the variables
  • Weak association between the variables

    • Which statistical test is appropriate for comparing the means of two groups with continuous outcomes?

    <p>Two-sample t-test</p> Signup and view all the answers

    Which statistical test can be used when both the exposure and outcome are binary?

    <p>All of the above</p> Signup and view all the answers

    What does a chi-square test indicate about the difference between groups?

    <p>It is not capable of indicating differences between groups</p> Signup and view all the answers

    When would you likely use a chi-square test instead of a two-sample z-test or Odds Ratio/Risk Ratio?

    <p>When the causal relationship between exposure and outcome is uncertain</p> Signup and view all the answers

    What do scatter plots show patterns in?

    <p>Associations between variables</p> Signup and view all the answers

    What does the ANOVA test assess?

    <p>Difference in means among more than two groups</p> Signup and view all the answers

    In the context of chi-square testing, what does the null hypothesis state?

    <p>The variables are independent</p> Signup and view all the answers

    What does the F-statistic in ANOVA represent?

    <p>Difference in means among groups</p> Signup and view all the answers

    When using a chi-square test, what does it mean if the p-value is less than the significance level?

    <p>The variables are dependent</p> Signup and view all the answers

    In ANOVA, what does the alternative hypothesis (HA) claim?

    <p>At least one of the means is different</p> Signup and view all the answers

    What does a chi-square test assess?

    <p>Difference in proportions among more than two groups</p> Signup and view all the answers

    What does ANOVA stand for in the context of biostatistics?

    <p>Analysis of Variance</p> Signup and view all the answers

    In ANOVA, what does HA represent?

    <p>The alternative hypothesis</p> Signup and view all the answers

    What is the purpose of a Chi-Square test in biostatistics?

    <p>To evaluate the association between two categorical variables</p> Signup and view all the answers

    What does Ho represent in the context of a Chi-Square test?

    <p>The null hypothesis</p> Signup and view all the answers

    Which statistical test generates an F-statistic?

    <p>ANOVA test</p> Signup and view all the answers

    In which type of exposure and outcome does ANOVA test for a significant difference in means?

    <p>Categorical exposure (more than 2 levels) and continuous outcome</p> Signup and view all the answers

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