Question 4 The following table displays the mathematics test scores for a random sample of college students, along with their final SY16C grades. Fit the regression line y = a+bx to the data and interpret the results. Use the regression equation to determine the SY16C grade for a college student who scored 60 on their achievement test. What would their SY16C grade be? Mathematics test (x) SY16C grades (y) 1 39 65 2 43 78 3 21 52 4 64 82 5 57 92 6 47 89 7 28 73 8 75 98 9 34 56
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.
Question 4
The following table displays the mathematics test scores for a random sample of college students, along with their final SY16C grades.
- Fit the regression line y = a+bx to the data and interpret the results.
- Use the regression equation to determine the SY16C grade for a college student who scored 60 on their achievement test. What would their SY16C grade be?
|
|
Mathematics test (x) |
SY16C grades (y) |
|
1 |
39 |
65 |
|
2 |
43 |
78 |
|
3 |
21 |
52 |
|
4 |
64 |
82 |
|
5 |
57 |
92 |
|
6 |
47 |
89 |
|
7 |
28 |
73 |
|
8 |
75 |
98 |
|
9 |
34 |
56 |
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