Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uu-F-statistic-805-en_uu-F-statistic-805-en
    nameuu-F-statistic-805-en
    sectionInferential Statistics/NHST/Test statistic/F-statistic
    typeschoice
    solutionFALSE, FALSE, TRUE, FALSE
    TypeInterpretating output
    ProgramSPSS
    LanguageEnglish
    LevelStatistical Literacy

    Question

    A group of researchers examined the impact of watching Sesame Street on the development of number knowledge in young children.

    Number knowledge was measured before children possibly started watching Sesame Street. One year after watching Sesame Street, knowledge of numbers was measured again.

    The researchers compared four groups (viewcat) that differed in the frequency in which they watched Sesame Street: I. Watched rarely II. Watched once or twice a week III. Watched 3 to 5 times a week IV. Watched more than 5 times a week

    The researchers’ outputs include the following:

    Which null hypothesis is tested with the test size F(3, 175) = 5.688?


    1. FALSE: H0: the mean knowledge of numbers is the same in the four viewcat groups
    2. FALSE: H0: the average knowledge of numbers is the same in the pre-measurement and post-measurement groups
    3. TRUE: H0: the differences in knowledge of numbers in the pre- and post-measurement are the same in the four viewcat groups
    4. FALSE: H0: the differences in knowledge of numbers in the pre-measurement and post-measurement are not equal in the four viewcat groups

    Solution

    The test magnitude F(3, 175) = 5.688 belongs in the table to the row ‘Time* viewcat’. So this test looks both within groups (pre-measurement and post-measurement = variable time) and between groups (different types of viewing behavior = variable viewcat). Thus, this test looks at whether the differences in knowledge of numbers at pre-measurement and post-measurement differ across the four viewcat groups. The hypothesis associated with this test is thus: H0: the differences in knowledge of numbers at pre-measurement and post-measurement are the same in the four viewcat groups.


    1. This answer is incorrect.
    2. This answer is incorrect.
    3. This answer is correct.
    4. This answer is incorrect.