Answer:
dependent: exam score, independent: presence of music,
confounding can be the fact that students in no music condition completed exam as they normally would
high validity
Explanation:
Dependent variable is the variable whose value depends on independent varaible. As independent variable is changed, the value of dependent variable changes
Students in no music condition completed exam as they normally would can be confounding as no description is given about how they would noramlly complete an exam. Any other factor and not no music condition, in normal exam condition could have affected their scores.
The experiment has high validity as the exam scores of student exposed to music was significantly higher than those not exposed to the music. The results also proved the hypothesis.
Answer: B
Explanation: just took the tests
<span>As of 2012, the deduction for a child who is not providing the major source of income for himself or herself is $3,700. In addition, the standard tax exemption for the head of household and his or her spouse is also $3,700. Adding these three values together gives a total exemption of $11,100.</span>
They are expressed as executive orders. The president can make these for other things too like limiting immigration or making treaties with foreign nations. They can be deemed unconstitutional and abolished by the supreme court, but they don't need the approval of the congress.
<em>Answer:</em>
<em>fixed-interval </em>
<em>Explanation:</em>
<em>Fixed-interval schedule</em><em> is considered as one of the four distinct types of reinforcement schedule in the </em><em>operant conditioning theory </em><em>which was introduced by</em><em> B. F. Skinner.</em><em> A fixed-interval schedule is referred to as a reinforcement schedule whereby the very first or initial response is being rewarded once a 'specified time amount' has been passed or elapsed.</em>
<em>In this case, Colin's behavior is reinforced on a fixed-interval schedule.</em>
