2023-02-20T03:06:59+03:00[Europe/Moscow] en true <p>categorical independent; continuous dependent </p>, <p>levels</p>, <p>factors</p>, <p>one-way ANOVA</p>, <p>there is no difference in group means</p>, <p>the group means are not all equal</p>, <p>Omnibus test</p>, <p>F; compares estimates of the ratio of variance estimates</p>, <p>f distribution</p>, <p>normal distribution, homogeneity of variance, independent observations</p>, <p>Multiple-comparison procedures</p>, <p>turkey's hsd, Bonferroni, Scheffe's method</p>, <p>MCP controls the possibility of making a type 1 error</p>, <p>Effect modification</p>, <p>Subgroup analysis</p>, <p>2-way anova</p>, <p>factorial design</p>, <p>repeated-measures anova</p>, <p>longitudinal </p> flashcards
ANOVA

ANOVA

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  • categorical independent; continuous dependent

    ANOVA is a technique to assess how one or more __________ variables affect a __________ variable.

  • levels

    -the different categories of a factor

  • factors

    -nominal variables that are independent

  • one-way ANOVA

    -involves a comparison of several (two or more) population means

  • there is no difference in group means

    Null hypothesis of One-Way ANOVA?

  • the group means are not all equal

    Alternative hypothesis of One-Way ANOVA?

  • Omnibus test

    -the test of the null in a one-way anova test.

  • F; compares estimates of the ratio of variance estimates

    ANOVA tests the means of a sample. T/F? Correct if false.

  • f distribution

    What kind of distribution will an ANOVA have if the null hypothesis turns out to be true?

  • normal distribution, homogeneity of variance, independent observations

    When we perform a t-test, what assumptions must be true?

  • Multiple-comparison procedures

    -when we reject the null hypothesis of an ANOVA test, we employ this statistical test to determine which specific differences exist among the population means

  • turkey's hsd, Bonferroni, Scheffe's method

    Common MCPs?

  • MCP controls the possibility of making a type 1 error

    Why do we employ the MCP instead of running several t-tests?

  • Effect modification

    -this occurs when the association between an independent variable of interest(exposure) and a health outcome(dependent variable) is depending on the value of one or more other variables called effect modifiers.

  • Subgroup analysis

    -a direct examination of whether the treatment effect depends on the patient subgroups

  • 2-way anova

    is used to estimate how the mean of a quantitative variable changes according to the levels of two categorical variables.

  • factorial design

    A research design with two or more categorical independent variables, each studied at two or more levels is called _________.

  • repeated-measures anova

    like the paired t test, can be used to test the equality of means when all members of a random sample are measured under a number of different conditions.

  • longitudinal

    Repeated-measures ANOVA are often employed in what kind of studies?