PMB lecture 3: Student’s t-test and InterpretationMB
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Questions and Answers

What is the purpose of using a Student's t-test in hypothesis testing?

  • To determine if there is a significant difference between two datasets (correct)
  • To calculate the variance within a sample
  • To find the mean value of a population
  • To establish a null hypothesis

    • In hypothesis testing, what is the function of a null hypothesis?

  • To calculate the F-test statistic
  • To prove the alternative hypothesis
  • To establish the initial assumption of no difference between groups (correct)
  • To test for outliers in the data

    • What does the F-test statistic assess in hypothesis testing?

  • The significance of the mean difference between two populations
  • The optimal sample size for a t-test
  • The difference in variance between two samples (correct)
  • The p-value for rejecting the null hypothesis

    • When determining statistical significance with a t-test, what does a low p-value indicate?

    <p>Strong evidence to reject the null hypothesis</p> Signup and view all the answers

    In the context of hypothesis testing, what parameter does the t-test compare between two datasets?

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

    What role does variance play in interpreting the results of a t-test?

    <p>Variance measures the spread of data points in each dataset</p> Signup and view all the answers

    What does it mean when the probability is above 0.05 in the context of hypothesis testing?

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

    Which statistical test assumes that the groups are sampled from normal distributions with equal variance?

    <p>Student’s t-test</p> Signup and view all the answers

    In hypothesis testing, if the p-value is 0.002, dark mean is 3.5, and light mean is 6.2, what conclusion can be drawn?

    <p>Support for the hypothesis that light promotes stomata opening</p> Signup and view all the answers

    When comparing 2 population means, which statistical test is typically used?

    <p>Student’s t-test</p> Signup and view all the answers

    What does the F-test assess in statistical analysis?

    <p>Equality of variances</p> Signup and view all the answers

    What does a p-value of 0.05 or below indicate in hypothesis testing?

    <p>Null hypothesis rejected</p> Signup and view all the answers

    In the context of ANOVA, what is the purpose of the F-value?

    <p>To test for the equality of population means across all treatments</p> Signup and view all the answers

    What does the null hypothesis in ANOVA suggest about the population means?

    <p>They are all equal across all treatments</p> Signup and view all the answers

    What is the interpretation of the Sum Sq value in the ANOVA table provided?

    <p>It represents the total sum of squares of the data</p> Signup and view all the answers

    Which statistical test is typically used to compare means between two groups?

    <p>Student's t-test</p> Signup and view all the answers

    What does the Mean Sq value represent in the ANOVA context?

    <p>The mean squared differences between sample means and grand mean</p> Signup and view all the answers

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