Understanding Descriptive Statistics Measures
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Questions and Answers

Which measure of central tendency is least affected by outliers?

  • Mean
  • Median (correct)
  • All are equally affected by outliers
  • Mode

    • What is the interquartile range?

  • The difference between the mean and median
  • The difference between the smallest and largest observations
  • The difference between the mode and median
  • The difference between the lower and upper quartiles (correct)

    • Which measure of dispersion is most affected by outliers?

  • Standard deviation
  • Range (correct)
  • Interquartile range
  • Variance

    • What is the mode used to determine?

    <p>The most frequent score in the data set</p> Signup and view all the answers

    Which measure of dispersion is defined as the average squared deviation from the mean?

    <p>Variance</p> Signup and view all the answers

    What is the purpose of quartiles?

    <p>To divide the data into four equal parts</p> Signup and view all the answers

    Which measure of central tendency is most resistant to the effects of outliers in a dataset?

    <p>Median</p> Signup and view all the answers

    If a dataset has a significant positive skew, which measure of central tendency would provide the most accurate representation of the typical value?

    <p>Median</p> Signup and view all the answers

    What is the difference between the calculation of the sample mean and the population mean?

    <p>The notation used is different</p> Signup and view all the answers

    If the values in a dataset are symmetrically distributed around the mean, which measure of central tendency would be appropriate to use?

    <p>Any of the above</p> Signup and view all the answers

    Which measure is used to quantify the spread of a dataset around the mean?

    <p>Variance</p> Signup and view all the answers

    What is the interquartile range used to measure?

    <p>The spread of the middle 50% of the data</p> Signup and view all the answers

    What statistical measure is used to describe the spread or dispersion of a dataset around its central value?

    <p>Variance</p> Signup and view all the answers

    Which of the following measures the difference between the upper and lower quartiles, providing a measure of spread for the middle 50% of the data?

    <p>Interquartile range</p> Signup and view all the answers

    Which of these divides a dataset into four equal parts, allowing for analysis of the distribution of values?

    <p>Quartiles</p> Signup and view all the answers

    If a dataset has values that are significantly different from the rest of the data, what are these called?

    <p>Outliers</p> Signup and view all the answers

    What statistical measure involves squaring the differences between each data point and the mean, then taking the average?

    <p>Variance</p> Signup and view all the answers

    Which measure is resistant to the effects of outliers and provides a more robust estimate of spread for skewed distributions?

    <p>Interquartile range</p> Signup and view all the answers

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