Descriptive Statistics Quiz
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Questions and Answers

What is the purpose of inferential statistics?

  • To summarize features from a collection of information
  • To compare the difference between data from control to experimental groups
  • To make inferences about the overall underlying population based on sample data (correct)
  • To show the distribution of how frequently causes appear in a data set

    • What does a P-value represent?

  • The most frequent number or item
  • The average number in a data set
  • The middle number in a data set
  • The probability that the result from an experiment are due to chance (correct)

    • What is the effect of outliers on data analysis?

  • Does not impact the analysis significantly
  • Reduces the variability of the data
  • Improves the accuracy of measures of central tendency
  • Can greatly deviate results with extreme points, leading to misrepresentation of a group of numbers (correct)

    • What is a histogram used for?

    <p>An approximate representation of the distribution of numerical data</p> Signup and view all the answers

    What is the main purpose of a frequency distribution?

    <p>To show the distribution of how frequently causes appear in a data set</p> Signup and view all the answers

    What is the definition of mean in statistics?

    <p>The average number in a data set</p> Signup and view all the answers

    What is the purpose of a T-test in statistics?

    <p>To compare the difference between data from control to experimental groups</p> Signup and view all the answers

    What is the significance of 0.05 in experimental results?

    <p>It means there is less than 5% chance that the results are due to chance</p> Signup and view all the answers

    What does a correlation coefficient (R) close to (-+)1 indicate?

    <p>A strong relationship between two variables</p> Signup and view all the answers

    What does a positive correlation coefficient indicate?

    <p>An upwards, increasing relationship</p> Signup and view all the answers

    What is the construct validity in an experiment?

    <p>A variable that the experimenter unintentionally or deliberately manipulates to promote desired results</p> Signup and view all the answers

    What is empiricism?

    <p>The philosophical perspective that states knowledge should be gained by direct observation of the world</p> Signup and view all the answers

    What does a negative correlation coefficient indicate?

    <p>A downwards, decreasing relationship</p> Signup and view all the answers

    What is a case study?

    <p>An in-depth investigation of an individual person or a group of people over an extended period of time</p> Signup and view all the answers

    What does a steep curve in a correlation plot indicate?

    <p>A stronger correlation</p> Signup and view all the answers

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