Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uva-sample-mean-1362-en_uva-sample-mean-1362-en
    nameuva-sample-mean-1362-en
    sectionInferential Statistics/Sampling Distributions/Sample mean
    typeschoice
    solutionFALSE, FALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty2
    p-value0.5905

    Question

    Five tennis balls in a box have diameters 62, 63, 64, 64 and 65 mm. Suppose you select two of the five tennis balls randomly (without putting them back), then there are 10 possibilities. What is then the average of all possible samples?


    1. FALSE: The mean is 2.5.
    2. FALSE: The average is 63.
    3. TRUE: The average is 63.6.
    4. FALSE: The average is 64.

    1. The average is 2.5: Incorrect
    2. The average is 63…: Incorrect
    3. The average is 63.6: Correct
    4. The average is 64…: Incorrect