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Quiz

RM3 Correlation and partial correlations

Sinead Sherman 9 perguntas 5,0 (1 avaliação)

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Perguntas do quiz (9)

  1. 1This Figure shows a scatter plot of the relationship between scores on a reading test and scores on a writing test. Based on what you can see from the plot there is:

    Imagem da pergunta 1
    1. AA negative relationship between writing and reading scores.
    2. BA positive relationship between writing and reading scores.
    3. CNo relationship between writing and reading scores.
    4. DA weak relationship between writing and reading scores.
  2. 2A researcher explores the relationship between a measure of vanity and the number of selfies posted on-line in a month. The data showed that r = .50. We can therefore determine that Vanity accounted for what percentage of variance in number of selfies posted on-line in a month?
    1. A25%
    2. B50%
    3. C0.5%
    4. D5%
  3. 3The process to rule out the influence of one or more additional variables on the relationship between the X and the Y variable is:

    1. Aregression
    2. BYate's correction
    3. Cpartial correlation
    4. Dbi-variate correlation
  4. 4When interpreting a correlation analysis, it is important to look at which of the following features?

    1. AThe strength of relationship
    2. BThe direction of relationship
    3. CThe statistical significance of relationship
    4. DAll of the above
  5. 5Which of the following does a scatterplot show?

    1. AThe mean value associated with two variables.
    2. BThe proportion of data falling into one of two categories.
    3. CThe frequency with which values appear in the data.
    4. DScores on one variable plotted against scores on a second variable.
  6. 6What does the calculation of Covariance tell us?
    1. AWhether the scores we have on variables X and Y are normally distributed.
    2. BThe extent to which variability on one variable is associated with a predictable change in another variable before standardisation.
    3. CThe extent to which variability on one variable is associated with a predictable change in another variable after standardisation.
    4. DThe percentage of explained variance between the two variables of interest.
  7. 7
    The table below shows us the zero order correlations and the partial correlations between a measure of quality of life after undergoing cosmetic surgery and participants self-reported level of depression , whilst controlling for a measure of quality of life BEFORE undergoing cosmetic surgery. Which of the following is correct.     Imagem da pergunta 7
    1. AThe proportion of variance explained is reduced once we control for the variability of our measure of quality of life BEFORE undergoing cosmetic surgery.
    2. BThe proportion of variance explained increases once we control for the variability of our measure of quality of life BEFORE undergoing cosmetic surgery.
    3. CControlling for the variability of our measure of quality of life BEFORE undergoing cosmetic surgery has no effect on the proportion of variance explained.
    4. DNone of the other options are correct
  8. 8Which of the following is the best description of the difference between a positive and a negative correlation?

    1. AA positive correlation shows that changes on X and Y variables are going in the same direction, whilst a negative correlation is showing us that changes on our X and Y variables are going in different directions.
    2. BA positive correlation shows that changes on X and Y variables are going in the same direction, whilst a negative correlation is showing us that there is no variability on our X and Y variables.
    3. CWe get negative correlations when we control for the influence of a third variable, and the third variable shares a lot of the variance.
    4. DA negative correlation is a weak one, whilst a positive correlation is a strong one.
  9. 9Which of the following statements is NOT true:

    1. AThe coefficient of determination is calculated by taking our equation for covariance and dividing by the Mean Score of the two variables of interest
    2. BThe coefficient of determination gives us a value relating to covariance that is in standardised units.
    3. CThe coefficient of determination is calculated by taking our equation for covariance and dividing by the Standard Deviation of the two variables of interest
    4. DThe correlation coefficient gives us a measure of the degree to which the two variables of interest vary together, in unstandardized units of measurement.

Informações

Descrição
Psychology Quiz sobre RM3 Correlation and partial correlations, criado por Sinead Sherman em 17-01-2019.
Idioma
English
Visualizações
166
Etiquetas
psychology
Avaliação
5,0 de 5 · 1 avaliação
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