Compute the correlation between before and after scores for these students. (Assume the correlation conditions have been satisfied and round your answer to 3 decimal places.) r =
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
![Recently a community college offered a 2-credit course to help students with math anxiety. At the
beginning of the course, each student took a 30-question survey (called MARS-S); the higher the score, the
more anxiety experienced by the student. The nine students remaining in the class took the same survey at
the end of the course. The before and after scores for each of the nine students who completed the course
are shown below.
student
before
after
1
72
69
2
66
52
83
71
4
97
85
95
61
78
45
95
56
8
52
43
9.
93
62
Compute the correlation between before and after scores for these students. (Assume the correlation
conditions have been satisfied and round your answer to 3 decimal places.)
r =
67](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F2591ce7b-f8a6-433f-b8ca-22a4215d002b%2F0fbdfceb-ea99-41f0-8748-a3fadbec2674%2Fu31wfgo_processed.jpeg&w=3840&q=75)
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