Statistical Methods for Dichotomous Variables
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Questions and Answers

Which type of test measures a person's observable activity?

  • Covert behavior test
  • Ability test
  • Achievement test
  • Overt behavior test (correct)

    • What is the main difference between group tests and individual tests?

  • Group tests have a shorter time limit than individual tests
  • Group tests are administered to more than one person at a time, while individual tests are given to one person at a time (correct)
  • Group tests measure achievement, while individual tests measure aptitude
  • Group tests measure overt behaviors, while individual tests measure covert behaviors

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

  • Ability test
  • Achievement test
  • Speed test
  • Aptitude test (correct)

    • Which individual is considered the father of modern psychology?

    <p>Wilhelm Wundt</p> Signup and view all the answers

    Who is credited with devising Fechner's Law, which states that the strength of a sensation grows as the logarithm of the stimulus intensity?

    <p>G.T. Fechner</p> Signup and view all the answers

    Who developed the Seguin Form Board Test and opened the world's first school for the mentally retarded?

    <p>Edouard Seguin</p> Signup and view all the answers

    Who is considered the father of mental testing and coined the term 'mental test'?

    <p>James McKeen Cattell</p> Signup and view all the answers

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

    <p>Chi Square Test for Independence</p> Signup and view all the answers

    What is the measure of symmetry in a distribution called?

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

    What is the formula for calculating the Z-score of a score in a distribution?

    <p>Z = (X-M)/SD</p> Signup and view all the answers

    What does the T-score have a mean of and a standard deviation of?

    <p>Mean of 50 and SD of 10</p> Signup and view all the answers

    Which test was developed by Lewis Terman and uses the concept of Intelligence Quotient (IQ)?

    <p>Stanford-Binet Intelligence Scale</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

    What is the first ever personality test utilized during WWI?

    <p>Woodworth Personal Data Sheet</p> Signup and view all the answers

    Which scale has the properties of magnitude and equal intervals?

    <p>Interval Scale</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 does the coefficient of determination (r2) tell us?

    <p>The proportion of the total variation in scores on Y that can be accounted for by knowing the scores on 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

    When is multiple regression appropriate?

    <p>When the criterion variable is continuous</p> Signup and view all the answers

    Which of the following formulas 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 regression line or line of best fit?

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

    What is the formula for testing the statistical significance of the Pearson product moment correlation coefficient using t-distribution?

    <p>t = r * sqrt((N - 2)/(1 - r^2))</p> Signup and view all the answers

    What is the formula for calculating the sum of squares?

    <p>Σ = (Y - Y')^2</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

    Which correlation coefficient is appropriate for two 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

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