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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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As a general rule, labeling requirements and enforcement tends to be more stringent in ________ countries than in ________ count
yarga [219]

Answer: c. Economically developed; economically developing

Explanation:

Economies that are doing fine in the society are giving a different measurement in requirements and enforcement than economies that are still finding their feet to get a stand. Policies that are used for economies doing well or improving are definitely different from that which is used for those still struggling.

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3 years ago
According to evidence, what is the first step a charismatic leader takes to influence followers? engaging in emotion-inducing an
Mandarinka [93]

Answer:

D. Articulate and appealing vision

Explanation:

Most of the time people that are in the throws of circumstances that are extremely uncomfortable are willing to listen to a promise.  While a charismatic leader is one that needs to be eloquent and set an example to the followers and have a direct plan of action they must first come with a dream.

As an example Barrack Obama was the first "African American" president of the United States of America. He did not specifically fit the description of many as "African American" due to his parentage. His mother was Causation and his father was African and had never had any descendants that were slaves.

This, however, did not stop him from appealing to the minorities with the  slogan "Yes, we can". This was eerily parallel to the spiritual hymn "We shall overcome someday". The dream of the U.S.A.'s first black president was a tangible reality.

This is not to say that he was not competent for the job but first appealing to a dream is the beginning of the win for the favor of the people.

5 0
3 years ago
In medieval times, scholars wishing to be trained at the highest levels would attend schools or groups of schools called _______
vagabundo [1.1K]

Answer:

Universities.

Explanation:

In medieval times, higher learning institutions began to become more important, with scholars desirous of better education attending schools or universities to attain such knowledge. These universities would excel in the study of arts, medicine, law, or medicine.

These universities were established in the kingdom of Italy and then spread to England, Portugal, and Spain. Initially, these universities would be based on Catholic schools but then evolve to a much wider scope of 'education'. The first universities were more concerned with philosophical studies, between students and masters, and 'classes' taken in big stadiums or halls. Later on, many modern universities would be established with western style organizational forms.

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3 years ago
How much energy in a food source is available to transfer to an organism that eats it?​
Akimi4 [234]

Answer:

The average amount of energy transferred from one trophic level to the next is 10%. For example, 10% of the solar energy that is captured by phytoplankton gets passed on to zooplankton (primary consumers). Ten percent of that energy (10% of 10%, which is 1%) gets passed on to the organisms (secondary consumers) that eat the zooplankton.

Explanation:

Energy transfer in and between organisms. Within the food chain energy can be passed and transferred from one organism to another. Whilst mammals get their energy sources from food – whether this be eating other animals or eating vegetation; plants get their energy from photosynthesis. Energy is passed between organisms through the food chain.

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3 years ago
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What regions in Europe escaped the Black Death?
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Answer:

There are a few places where the plague never spread to, including the area around Milan. But most notably, the entire Kingdom of Poland is spared, even as virtually every other region is infected.

Explanation:

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