Compare the following coefficients of correlation and their corresponding Ns, then answer the questions. Notice that all correlation values are statistically significant. Which coefficient of correlation permits more accurate prediction of one variable from the other?

a. r = +.80 N = 80 c. r = -32 N = 40
b. r = +.32 N = 300 d. r = -.87 N = 80


D

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Elena is 11. Elena walks home from school and lets herself into the house with her own house key. In this respect, Elena is similar to about what percentage of children in fourth through eighth grade??

a. ?1% b. ?10% c. ?22% d. ?50%

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Answer the following statement(s) true (T) or false (F)

NCLB 2001 stipulated that schools were expected to show annual yearly progress toward the goal of 100% proficiency in 2014.

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Which of the following is an accurate statement about Attention Deficit/ Hyperactivity Disorder?

a. ADHD is over diagnosed b. Children with ADHD are over medicated c. ADHD can be caused by poor parenting d. Children along with adults may be diagnosed with ADHD

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The _______ test is based on calculating the difference between two sets of scores, making a note of the sign of the difference (positive or negative) and then ranking the differences from lowest to highest ignoring whether they are positive or negative.

A. Wilcoxon rank-sum test B. Mann–Whitney U test C. Dependent D. Wilcoxon signed-rank test

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