Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uu-t-statistic-801-en_uu-t-statistic-801-en
    nameuu-t-statistic-801-en
    sectionInferential Statistics/NHST/Test statistic/t-statistic
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeCalculation
    ProgramSPSS
    LanguageEnglish
    LevelStatistical Reasoning

    Question

    In research on twins, a distinction is often made between identical and twin twins. A questionnaire (with 5-point Likert scale) is used to examine social behavior of identical twins. Is there a difference between the oldest (first-born) twin and the youngest? Ten pairs of twins participate in this little study. The oldest twins had a mean test score of 3.6 and the youngest twins had a mean of 3.3, for a mean difference of MD = 0.3. The SS for the difference scores was 3.43.

    Is there a significant difference between the oldest and youngest twins at α\alpha = 0.10?


    1. FALSE: Yes, because t > tcrit = 1.383
    2. TRUE: No, because t < tcritical = 1.883
    3. FALSE: No, because t < tcritical = 1.383
    4. FALSE: Yes, because t > tcritical = 1.883

    Solution

    The difference between the oldest and youngest twins is not significant because t<tcrit=1.883


    1. This is incorrect.Do you have the right critical value?
    2. Right!
    3. This is incorrect.Do you have the right critical value?
    4. This is incorrect.