Measures of Spread: Statistical Tools
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Questions and Answers

What is the purpose of descriptive statistics?

  • To generalize the findings from a sample to a population
  • To describe and summarize the parameters of a population or the statistics of a sample (correct)
  • To test hypotheses about a population
  • To gather data from a sample

    • What is the term for all of the items or individuals that a researcher wants to study?

  • Population (correct)
  • Parameter
  • Statistic
  • Sample

    • What is the calculation to find the variance?

  • Sum of the differences divided by the number of data points
  • Mean of the squared differences
  • Sum of squared differences divided by the number of data points (correct)
  • Squared difference of the mean

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

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

    What is the purpose of gathering data from a sample?

    <p>To make inferences about the population</p> Signup and view all the answers

    What is the result of subtracting the mean from each value in a data set and then squaring the differences?

    <p>The squared differences</p> Signup and view all the answers

    What is the primary goal of exploratory research?

    <p>To study variables pertinent to a specific situation</p> Signup and view all the answers

    What type of research involves the use of inferential statistics to test a hypothesis?

    <p>Quantitative research</p> Signup and view all the answers

    What is the primary difference between quantitative and qualitative data?

    <p>The type of data collected</p> Signup and view all the answers

    What is the purpose of measures of location in statistical analysis?

    <p>To determine the position of values in the frequency distribution</p> Signup and view all the answers

    Which type of research involves studying the effects of variables on each other?

    <p>Experimental research</p> Signup and view all the answers

    What is the characteristic of non-quantitative research?

    <p>It involves the use of descriptive data</p> Signup and view all the answers

    What is the primary purpose of a frequency distribution?

    <p>To display the frequency of various outcomes in a sample</p> Signup and view all the answers

    What is the term for measures that tell you the position of values in a frequency distribution?

    <p>Measures of location</p> Signup and view all the answers

    What is a characteristic of the intervals in a frequency distribution?

    <p>They must be mutually exclusive and exhaustive</p> Signup and view all the answers

    What do measures of central tendency provide?

    <p>The typical value of data</p> Signup and view all the answers

    What is a common association of frequency distributions?

    <p>Charting of a normal distribution</p> Signup and view all the answers

    What is a common use of frequency distributions in statistical analysis?

    <p>To organize and summarize data</p> Signup and view all the answers

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