Exam 1

  1. Metainformation

    Tag Value
    fileDescriptive-statistics_uva-variance-631-en_uva-variance-631-en
    nameuva-variance-631-en
    sectionDescriptive statistics/Summary Statistics/Measures of Spread/Variance
    typeschoice
    solutionFALSE, TRUE, FALSE, FALSE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty4.329
    p-value0.0645

    Question

    From each of two normally distributed populations with equal variances a sample is drawn.ÊÊÊ Sample 1: n = 8, mean = 18, sd = 3.4. Sample 2: n = 6, mean = 24, sd = 6.9. If we assume that the two population variances are equal, then the best estimator for the joint population variance


    1. FALSE: 26.52
    2. TRUE: 26.58
    3. FALSE: 29.585
    4. FALSE: 27.01

    1. 26.52: Incorrect
    2. 26.58: Correct
    3. 29.585: Incorrect
    4. 27.01: Incorrect