Exam 1

  1. Metainformation

    Tag Value
    fileDescriptive-statistics_uva-measures-of-location-180-en_uva-measures-of-location-180-en
    nameuva-measures-of-location-180-en
    sectionDescriptive statistics/Summary Statistics/Measures of Location
    typeschoice
    solutionFALSE, TRUE, FALSE
    TypeConceptual
    LanguageEnglish
    LevelStatistical Literacy
    IRT-Difficulty3.407
    p-value0.2285

    Question

    In a study of the length of time it takes to make a decision about purchasing a home based on photo opportunities, researchers assigned 30 people randomly assigned to one of two conditions: (1) 20 photos of the house were shown and (2) 5 photos of the house were shown. The mean of group (1) was 2.0 hours and standard deviation 2.1; the mean of group (2) was 4.8 hours and standard deviation 3.2. The researchers assume that the standard deviations in the population are are equal and thus arrive at a standard error of 1.025 and 28 degrees of freedom. A 95% confidence interval for the difference μ1 - μ2 is


    1. FALSE: (-3.80;-1.80).
    2. TRUE: (-4.90; -0.70).
    3. FALSE: (-5.1; -0.90).

    1. (-3.80;-1.80).: Incorrect
    2. (-4.90; -0.70).: Correct
    3. (-5.1; -0.90).: Incorrect