Continuous Data Analysis: Central Tendency and Variability

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Questions and Answers

What does a positive correlation coefficient indicate?

  • No correlation
  • A perfect relationship
  • A strong relationship (correct)
  • A weak relationship

What type of data is Pearson’s r used with?

  • Discrete data
  • Ordinal data
  • Categorical data
  • Continuous data (correct)

What does a correlation coefficient of 0 indicate?

  • A strong relationship
  • A perfect relationship
  • A weak relationship
  • No correlation (correct)

When is Spearman’s Rho used?

<p>With ordinal data (D)</p> Signup and view all the answers

What does variability refer to when analysing graphics in the context of data?

<p>The extent to which scores are spread about the central tendency (B)</p> Signup and view all the answers

What does skewness refer to in the context of data analysis?

<p>Symmetry or asymmetry (D)</p> Signup and view all the answers

Which measure of central tendency is the middle score in a set of ordered data?

<p>Median (A)</p> Signup and view all the answers

What does kurtosis refer to in the context of data analysis?

<p>Peakedness or flatness around the central tendency (A)</p> Signup and view all the answers

In a boxplot, what does the line in the middle of the box represent?

<p>The median (central tendency) (D)</p> Signup and view all the answers

What does the range refer to in the context of variability?

<p>The difference between the highest and lowest scores (D)</p> Signup and view all the answers

In the context of the given text, what is the independent variable in the relationship between studying and grades?

<p>Studying (D)</p> Signup and view all the answers

Based on the text, what type of studies allow us to say that the independent variable causes a change in the dependent variable with certainty?

<p>Experimental studies (RCT) (A)</p> Signup and view all the answers

What is the term used in the text for other potentially influencing factors that are associated with the independent and dependent variables?

<p>Confounding variables (A)</p> Signup and view all the answers

In what type of studies can we be sure of the cause and effect relationship between independent and dependent variables?

<p>Experimental studies (RCT) (B)</p> Signup and view all the answers

In the context of the given text, what is the dependent variable in the relationship between office workers and heart disease?

<p>Heart Disease (B)</p> Signup and view all the answers

What type of studies do not allow us to be certain about cause and effect relationships between variables?

<p>Observational studies (A)</p> Signup and view all the answers

Based on the text, what term is used for examining the relationship between two category variables or two continuous variables?

<p>Association tests (C)</p> Signup and view all the answers

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