Statistical Methods for Dichotomous Variables

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?

Variance (A) Signup and view all the answers

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

It was developed by Lewis Terman (B) Signup and view all the answers

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

IQ = (MA/CA) x 100 (D) Signup and view all the answers

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

Sam Beck (B) Signup and view all the answers

What is the purpose of exploratory data analysis?

To summarize the main characteristics of data (C) Signup and view all the answers

Which of the following is a data reduction technique?

Principal components (A) Signup and view all the answers

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

Pearson's r (D) Signup and view all the answers

Who is considered the Father of Classical Test Theory?

Charles Spearman (A) Signup and view all the answers

What does Classical Test Theory assume about errors of measurement?

Errors of measurement are random (A) Signup and view all the answers

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

Achievement test (A) Signup and view all the answers

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

Aptitude test (C) Signup and view all the answers

What is the purpose of a maximum performance test?

To measure what a person can achieve when making maximum effort (D) 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?

Phi coefficient (A) Signup and view all the answers

What is the standard error of estimate (Syx)?

The standard deviation of the residuals (B) Signup and view all the answers

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

The proportion of the total variation in scores on Y that we know as a function of information about X (A) Signup and view all the answers

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

Coefficient of alienation (A) Signup and view all the answers

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

$X = m(Z) + SD$ (A) Signup and view all the answers

What is the formula for the interquartile range?

$IQR = Q3 - Q1$ (B) Signup and view all the answers

What is the formula for the regression line?

$Y' = a + bX$ (D) Signup and view all the answers

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

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

Who is considered the Father of Comparative Psychology?

Sir Francis Galton (B) Signup and view all the answers

Statistical Methods for Dichotomous Variables

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