Exam 1

  1. Metainformation

    Tag Value
    fileInferential_Statistics_uu-Effect-size-807-en_uu-Effect-size-807-en
    nameuu-Effect size-807-en.Rmd
    sectionInferential Statistics/Effect size
    typeschoice
    solutionTRUE, FALSE, FALSE, FALSE
    TypeCalculation
    LanguageEnglish
    LevelStatistical Literacy

    Question

    Twenty-five women between ages 70 and 80 were randomly selected from the general population of women their age to take part in a special program to increase their knowledge of dementia. After the course, the women had an average knowledge score of 25. The mean knowledge for the general population of women of this age group is 22, with a standard deviation of 4. Assume that the mean knowledge of dementia in the population is normally distributed. Use the .05 level of significance. The researcher uses the following research question: Does the special program increase women’s knowledge of dementia?

    What is the effect size?


    1. TRUE: 0.75
    2. FALSE: 3.75
    3. FALSE: 1.50
    4. FALSE: 1.65

    Solution

    d=25−224=34=0.75d=\frac{25-22}{4}=\frac{3}{4}=0.75