Which of the following statements is true?
A. The standard deviation is calculated only from sample attributes.
B. The standard error is a measure of central tendency.
C. All of the above.
D. The standard error is calculated solely from sample attributes.
Answer: D
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Teachers can safely and effectively clean blood spills using appropriate precautions and a bleach and water solution
Indicate whether the statement is true or false
Developing self-awareness related to your uses of time, consistently scheduling your time, and rewarding yourself for completing scheduled tasks are all
A. ways to measure productivity. B. strategies for reducing procrastination. C. essential to accurate prioritizing. D. efforts to promote one's successes.
Suppose you test the effects of a drug on rats’ learning by giving them 0, 10, or 20 milligrams of the drug. This experiment has ______ independent variable(s).
a. four b. three c. two d. one
Classroom teachers who develop tests are most directly concerned with __________ validity; researchers who test theories to explain traits are more directly concerned with __________ validity.
A) content; construct B) b. predictive; content C) construct; content D) content; predictive E) predictive; construct