Gump (2005) studied 300 undergraduates and found a correlation of -0.60 between the number of absences and grades. Write an explanation of what this means so that someone unfamiliar with correlations could understand it.

Answers

Answer 1

In 2005, a researcher named Gump conducted a study on 300 undergraduate students and found a correlation between the number of absences and their grades.

The correlation was measured at -0.60, which means there was a negative relationship between the two variables. Essentially, this means that as the number of absences increased, the students' grades tended to decrease.
To put it in simpler terms, imagine that you have a friend who is an undergraduate student and they tend to skip a lot of classes. According to Gump's study, if your friend's absences increase, there is a high likelihood that their grades will decrease as well. Conversely, if your friend starts attending class more regularly, their grades may improve.

Correlation refers to the relationship between two variables, in this case, absences and grades. A correlation of -0.60 means that there is a moderate negative relationship between the two variables. While correlation does not prove causation, it can help researchers to understand how changes in one variable may affect the other.

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Related Questions

what type of analysis involves analyzing a polynomial wherein its value approaches or approximates that of its dominant term, as the size of the problem gets very large?

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The type of analysis that involves analyzing a polynomial wherein its value approaches or approximates that of its dominant term, as the size of the problem gets very large is called asymptotic analysis.

In this type of analysis, we focus on the behavior of a function as its input grows arbitrarily large, without necessarily caring about the precise values it takes. This analysis is particularly useful when dealing with algorithms and data structures, where the size of the input is often the most important factor in determining their efficiency.

By analyzing the growth rate of a function, we can make informed decisions about which algorithms and data structures to use for a given problem, and predict their performance on large inputs. Asymptotic analysis is a fundamental tool in computer science and mathematics.

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Which of the following statements will display the value of FL assigned to the state column as FLORIDA?
a.SELECT customer#, city, SUBSTR( 'FL', 'FLORIDA') FROM customers
WHERE state = 'FL';
b.SELECT customer#, city, REPLACE(state, 'FL', 'FLORIDA') FROM customers
WHERE state = 'FL';

Answers

The correct statement that will display the value of FL assigned to the state column as FLORIDA is

SELECT customer#, city, REPLACE(state, 'FL', 'FLORIDA') FROM customers WHERE state = 'FL'; So option b is the correct answer.

In this statement,

SELECT customer#, city, REPLACE(state, 'FL', 'FLORIDA') FROM customers WHERE state = 'FL';

the REPLACE function is used to replace the substring 'FL' with 'FLORIDA' in the state column. This will change the value of 'FL' to 'FLORIDA' for the rows where the state is 'FL'.

The SELECT statement retrieves the customer#, city, and the modified state column value from the customers table where the state is 'FL'. so the correct answer is option b.

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