Measures of Central Tendency in Statistics
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Questions and Answers

What is the name of the average that considers the relative importance of each observation?

  • Simple Average
  • Moving Average
  • Mode Average
  • Weighted Average (correct)

    • A dataset with two distinct peaks is an example of a _______ distribution.

  • Normal
  • Multimodal
  • Unimodal
  • Bimodal (correct)

    • What is the purpose of a moving average?

  • To smooth out fluctuations in a time series (correct)
  • To compare performance across different time frames
  • To track changes over time
  • To find the overall average of a dataset

    • What is the formula to calculate the index number?

    <p>Index = (Current Period Value / Base Period Value) × 100</p> Signup and view all the answers

    Which type of average is used to find the average score of a class on a test?

    <p>Simple Average</p> Signup and view all the answers

    What is the term for the number of peaks in a dataset?

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

    What is the most widely used measure of central tendency in statistics?

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

    What is the middle value in a list of numbers when it is sorted in increasing order?

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

    What is the most frequent value in a dataset?

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

    What is the symbol for the population mean?

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

    What type of sampling involves selecting a subset of the population based on certain characteristics?

    <p>Stratified sampling</p> Signup and view all the answers

    What is the average of a dataset that is calculated by giving more weight to certain values?

    <p>Weighted average</p> Signup and view all the answers

    What type of skewness is present when the mean is greater than the median?

    <p>Right or positive skewness</p> Signup and view all the answers

    What is the primary difference between the equation for sample variance and the equation for population variance?

    <p>The sample equation uses N-1, while the population equation uses N</p> Signup and view all the answers

    According to the Empirical Rule, what percentage of data falls within two standard deviations from the mean?

    <p>Roughly 95%</p> Signup and view all the answers

    What is the relationship between the variance and the standard deviation?

    <p>Standard deviation is the square root of the variance</p> Signup and view all the answers

    What does a low variance indicate about the data points in a dataset?

    <p>They are close to the mean and to each other</p> Signup and view all the answers

    What type of skewness is present when the mean is less than the median?

    <p>Left or negative skewness</p> Signup and view all the answers

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