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Darina [25.2K]
3 years ago
12

Professor Izadi is interested in determining the association between sleep and cognitive performance. He surveyed his students a

bout the number of hours they slept the night before an exam and then correlated these scores with their test grades. He found a .81 correlation between these two variables. What does this result mean?
Social Studies
1 answer:
I am Lyosha [343]3 years ago
5 0

Answer:

There is a high positive correlation between sleep and exam performance

Explanation:

Correlation studies the degree of association between two variables. A correlation coefficient of 0.5 to 1 is regarded as a strong correlation, that is an increase in one variable will result in an increase in the other variable. A correlation coefficient that lies between 0.3 to 0.49 is regarded as moderately correlated while a value of 0 means that there is no correlation.

Thus, the result of this study shows that an increase in sleeping time will result in better exam performance.

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These are three questions: 

1. <span>Teamwork can be frustrating because of all except:

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the hassles of group work.
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Now, we are looking for something positive, because we are looking for a reason why team work is NOT frustrating. The correct answer is "</span> satisfaction from group success ". A success of the group can make all the group members happy and can strengthen the relationship in the group. Think for example the happiness of the members of a soccer team after a goal - even the members who are not currently playing are happy.<span>



2. teamwork can be motivating because of all except:

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interaction.
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Here "</span>self-reliance" is the correct answer, as there is little self-reliance in the group. Instead, you rely on the other team members and they rely on you - there is a mutual reliance in the group. This mutual reliance can also be a positive thing, but self-reliance is not a part of group work.<span>

3.some people have a preference for individual work because of all except:

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Here the correct answer is "</span>they welcome the opinions of others" - this will be something that can be found in a group work, not in an individual work, since if you work alone, there is noone to provide you with their feedback! If they want to have access to the opinion of others and to the feedback of others, they should consider group work instead!
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Answer:

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