Difference Between Groups Using Two-sample Inference

10 Questions | Total Attempts: 107

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Difference Between Groups Using Two-sample Inference

With a combination of significance tests and confidence intervals, evaluate your knowledge of how to use two-sample inference to define the difference between groups.


Questions and Answers
  • 1. 
    Hypotheses convening the relative size of the means of two population are tested by...
    • A. 

      Sample value and P-value

    • B. 

      Critical Values and P-value

    • C. 

      Confidence Interval

    • D. 

      Point estimate and P-value

  • 2. 
    Independent values are composed of groups that are in no way matched to them.
    • A. 

      Always true

    • B. 

      Often true

    • C. 

      Occasionally true

    • D. 

      Never true

  • 3. 
    A point estimate for the difference in two group population is the...
    • A. 

      Difference in different sample means

    • B. 

      Difference in standardised test statistics

    • C. 

      Similarities in different sample means

    • D. 

      Difference in corresponding sample means

  • 4. 
    A dependent sample is one where two groups are formed from matched pairs.
    • A. 

      Always true

    • B. 

      Often true

    • C. 

      Occasionally true

    • D. 

      Never true

  • 5. 
    Which of these is the procedure used to test hypotheses concerning a single population? 
    • A. 

      3 steps

    • B. 

      4 steps

    • C. 

      5 steps

    • D. 

      6 steps

  • 6. 
    The null and alternative hypotheses will always be expressed in terms of...
    • A. 

      Similarities of the two population means

    • B. 

      Difference in confidence interval

    • C. 

      Differences of the two population means

    • D. 

      Similarities in confidence interval

  • 7. 
    The number s d is an estimate of the standard deviations σd of the population of differences.
    • A. 

      True

    • B. 

      False

    • C. 

      Not defined

    • D. 

      Depends on some factors

  • 8. 
    Hypotheses testing is an integral part of research.
    • A. 

      True

    • B. 

      False

    • C. 

      Maybe

    • D. 

      Depends on some factors

  • 9. 
    When the data are collected in pairs, the differences computed for each pair is...
    • A. 

      Different from the data used in formulas

    • B. 

      Different from the data used in confidence interval

    • C. 

      The data that are used in the formulas

    • D. 

      The data used in confidence interval

  • 10. 
    The quantity sp2 is called the pooled sample variance.
    • A. 

      True

    • B. 

      False

    • C. 

      Maybe

    • D. 

      Depends on some factors