Understanding Data Scientists' Skill Sets and Data Sizes
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Questions and Answers

What is the formula to calculate the range of a dataset?

  • Mode of the dataset
  • Square root of the variance
  • Highest value - Lowest value (correct)
  • Sum of all values / Number of values

    • In statistics, what does 'normal distribution' refer to?

  • Distribution where the mean, mode, and median are equal
  • Distribution where 95% of data falls between 1 standard deviation
  • Distribution where data has no outliers
  • Distribution where 99.7% of data falls between 2 standard deviations (correct)

    • Which variable is also known as the target or outcome in a statistical model?

  • Variance
  • Dependent variable (correct)
  • Mode
  • Independent variable

    • What is the primary use of the median in statistical analysis?

    <p>Determining central tendency</p> Signup and view all the answers

    Which measure of dispersion is obtained by taking the square root of the variance?

    <p>Standard deviation</p> Signup and view all the answers

    What term is used for variables that predict the dependent variable in a statistical model?

    <p>Explanatory variables</p> Signup and view all the answers

    How is population variance represented in statistics?

    <p>[ Sum of squares ] divided by [ Total number of values ]</p> Signup and view all the answers

    'Mode' is not typically used when dealing with:

    <p><strong>Non-numerical data</strong></p> Signup and view all the answers

    'Parametric vs. Non-parametric' is an important distinction in:

    <p><strong>Statistical analysis</strong></p> Signup and view all the answers

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