If you were to hypothesize that there is no relationship between reaction time and problem-solving abilities, you would have a ______.
a. directional research hypothesis
b. nondirectional research hypothesis
c. null hypothesis
d. hypothesis type that cannot be determined
Ans: c
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While students are practicing independently teachers should practice all of the following except:
A) walk the class through the first few items B) schedule seatwork as soon as possible after feedback exercises C) circulate around the classroom D) immediately correct students who are responding incorrectly
The probability of randomly guessing the correct answer to a multiple-choice item increases as the number of alternatives increases
a. True b. False
Given: m = 40 s = 10 n = 25; How often can we expect to find sample means smaller than 36 when we randomly sample from this normal population?
What will be an ideal response?
. An environmental factor can only threaten the internal validity of a study when it ______ with the levels of an independent variable.
A. is held constant B. is equal C. varies systematically D. is eliminated