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.
The water level in the reservoir of an ice machine is maintained at the correct level of a float switch.
<h3>
What is a float switch?</h3>
- A level sensor of the kind used to measure the liquid level in a tank is a float switch.
- The switch can operate a pump, serve as an alert or indicator, or regulate other equipment.
- A float that elevates a rod to activate a microswitch is another typical form.
- A float holding a magnet surrounds and is steered by a reed switch set in a tube in one pattern.
- The float closes the reed switch by raising the magnet to it. One component can accommodate multiple reeds installed in the tube for various level indications.
Know more about float switch with the help of the given link:
brainly.com/question/27881630
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Free markets are viewed as a system in which the prices of goods are determined by consumers
