A discrete variable requires nominal or interval scaling
Indicate whether the statement is true or false
T
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A person who is a high-maintenance individual, always seeking some sort of attention is called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
Which of the following is true of a 2 × 3 design?
a. It has 1 variable with 2 levels and 1 variable with 3 levels. b. It has 1 variable with 6 levels. c. It has 2 variables with 3 levels. d. It has 2 variables with 2 levels and 3 variables with 3 levels.
Which of the following has been shown to play a role in the development of Alzheimer's disease?
a) head injury b) immune system functioning c) an abnormality on chromosome 21 d) all of the above
A human-factors psychologist suspects that Keyboard A is designed better and will therefore facilitate a higher words-per-minute rate than Keyboard B or Keyboard C. He tests 10 participants and measures their typing speed using all three keyboards. He counterbalances the order in which participants use the keyboards. Which of the following is the best representation of his research hypothesis?
a. Is Keyboard A designed better than Keyboard B or Keyboard C? b. Keyboard design does not affect typing speed. c. Does keyboard design affect typing speed? d. Keyboard design affects typing speed.