The sphericity assumption is that pairs of scores in the population have equal variance.
Answer the following statement true (T) or false (F)
True
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When Izzy gets home from school, she hands her book report to her grandmother to show off the A that she got. She is surprised when her grandmother holds the report at arm's length to read it rather than holding it closer to her eyes. Izzy's grandmother seems to be suffering from a. cataract
b. presbycusis. c. presbyopia. d. glaucoma.
Jack is an 18-month-old toddler who runs about his house. His parents are amazed at how frequently he falls. In addition to his inexperience, what contributes to Jack's apparent clumsiness?
A. weak legs B. top-heaviness C. lack of abdominal muscle tone D. walking in a toe-to-heel fashion
For some strange reason, a music teacher gives students a vocabulary test before deciding what the right musical instrument is for each student. The vocabulary test gives consistent results, but the students are rarely happy with the instrument they play. The problem is that the vocabulary test ____
a. is valid but not reliable b. has excessive reliability c. is neither reliable nor valid d. is reliable but not valid
A correlation coefficient's negative sign indicates that
a. the correlation is significant (real). b. the two factors are unrelated. c. the first factor causes the second factor to change. d. as one variable increases, the other variable decreases.