There are ______ regression equations for two correlated variables.
A. 1
B. 2
C. 3
D. 0
Ans: B
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Which of the following practices was the core of the criticism of NCLB?
a. The use of standardized testing in schools. b. The number of tests used in schools. c. The use of tests that have shown racial biases. d. The use of test scores as a way of achieving accountability for schools.
One formula for the correlation between two dichotomous variables is
a. Spearman's rank order formula. b. the point biserial correlation. c. the phi coefficient. d. the biserial correlation.
Sexual activity with a partner usually peaks in the 30s.
Answer the following statement true (T) or false (F)
To say that one is worried about confounds is to say that one is worried about the:
A) problem of deduction B) trade-off between internal and external validity C) third variable problem D) problem of covariation