Statistical Methods for Dichotomous Variables
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Questions and Answers

Which statistical test is used to evaluate the relationship between two variables in a population?

  • Cochran's Q Test
  • Chi Square Test for Independence (correct)
  • Chi Square Test for Goodness of Fit
  • McNemar's Test

    • What is the formula for calculating the Z-Score?

  • Z = X-M * SD
  • Z = X-M/SD
  • Z = (X-M)/SD (correct)
  • Z = (X-M) * SD

    • What is the measure of symmetry in a distribution called?

  • Variance
  • Standard Deviation
  • Kurtosis
  • Skewness (correct)

    • What is the average squared deviation around the mean called?

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

    Which of the following is true about the Stanford-Binet Intelligence Scale?

    <p>It was developed by Lewis Terman</p> Signup and view all the answers

    What is the formula for calculating Intelligence Quotient (IQ)?

    <p>IQ = (MA/CA) x 100</p> Signup and view all the answers

    Who developed the first ever personality test, the Woodworth Personal Data Sheet?

    <p>Sam Beck</p> Signup and view all the answers

    What is the purpose of exploratory data analysis?

    <p>To summarize the main characteristics of data</p> Signup and view all the answers

    Which of the following is a data reduction technique?

    <p>Principal components</p> Signup and view all the answers

    What is the correlation statistic used for interval/ratio variables?

    <p>Pearson's r</p> Signup and view all the answers

    Who is considered the Father of Classical Test Theory?

    <p>Charles Spearman</p> Signup and view all the answers

    What does Classical Test Theory assume about errors of measurement?

    <p>Errors of measurement are random</p> Signup and view all the answers

    Which type of test measures a person's previous learning?

    <p>Achievement test</p> Signup and view all the answers

    Which type of test measures a person's potential for learning or acquiring skills?

    <p>Aptitude test</p> Signup and view all the answers

    What is the purpose of a maximum performance test?

    <p>To measure what a person can achieve when making maximum effort</p> Signup and view all the answers

    Which correlation coefficient is used when both variables are dichotomous and at least one of them is a true dichotomous variable?

    <p>Phi coefficient</p> Signup and view all the answers

    What is the standard error of estimate (Syx)?

    <p>The standard deviation of the residuals</p> Signup and view all the answers

    What does the coefficient of determination (r2) tell us?

    <p>The proportion of the total variation in scores on Y that we know as a function of information about X</p> Signup and view all the answers

    What is the measure of non-association between two variables called?

    <p>Coefficient of alienation</p> Signup and view all the answers

    Which formula is used to convert a raw score into a z-score?

    <p>$X = m(Z) + SD$</p> Signup and view all the answers

    What is the formula for the interquartile range?

    <p>$IQR = Q3 - Q1$</p> Signup and view all the answers

    What is the formula for the regression line?

    <p>$Y' = a + bX$</p> Signup and view all the answers

    What is the formula for the Pearson product moment correlation coefficient?

    <p>$r = \frac{cov(X,Y)},{SD(X) \times SD(Y)}$</p> Signup and view all the answers

    Who is considered the Father of Comparative Psychology?

    <p>Sir Francis Galton</p> Signup and view all the answers

    Which law states that the just-noticeable difference between two stimuli is proportional to the magnitude of the stimuli?

    <p>Weber's Law</p> Signup and view all the answers

    Who is considered the Father of Mental Testing?

    <p>Alfred Binet</p> Signup and view all the answers

    What is the purpose of a Power Test?

    <p>To present complex questions</p> Signup and view all the answers

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