HVAC, which stands for Heating, Ventilation and Air Conditioning, is very useful in countries with 4 seasons. During summer, they use air conditioning; during winter, they use heat pumps. The capacity of HVACs are usually expressed in tons. 1 ton is equal to 12,000 BTU/h. For residential heating systems, the capacity usually ranges from 1-5 tons.
Answer:
Sample size
Explanation:
In the study the population is known as the sample size. Sample size is defined as the number of samples measured which are used in a survey.
The random picking of 500 people of that age to fill out her survey to describe the attitudes of all 18-year-old Houstonians concerning the legalization of marijuana is known as the sample size of the survey.
Answer:
A psychologist who notes that students become stressed as well during this time may attempt to claim that the reason for the increase in student illness is that research has found that stress can suppress immune functioning.
Explanation:
This is a simple matter of reasoning. One well-known consequence of stress in the suppression of immune functioning. In other words, when we are stressed, our immune system does not work properly. When the immune system does not function well, we lose our defenses against diseases, getting sick more easily. Since many students tend to be stressed out about their final exams, it is only logical for their immune system to be suppressed. That is why they tend to develop illnesses in the days before the final exams.
A "cardinality" is any situation where one entity occurrence does not demand a counterpart entity occurrence in a certain relationship.
<h3>What exactly is an entity's cardinality?</h3>
The term "cardinality" refers to the maximum number of relationships that can exist between instances of one entity and instances of another. The lowest number of times an instance in one entity can be connected to an instance in a related entity is known as ordinality, on the other hand.
When anything is counted, the number that results is referred to as its cardinality. As a result, a set's cardinality is equal to the number of its elements. For instance, the set 1, 2, 3, 4, 5 has a higher cardinality of five than the set 1, 2, 3, which has a cardinality of three.
Learn more about cardinality: brainly.com/question/19865374
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