56. SAT Scores by Income The following bar graph shows U.S. critical reading SAT scores as a function of household income: 600 503 517 525 529 536 542 488 500 434 462 400 300 200 100 0. 0-20 40-60 80-100 120-140 160-200 Family income ($1,000) These data can be modeled by S(x) = 550 136(0.985)*, where S(x) is the average critical reading SAT score of stu- dents whose household income is x thousand dollars per year. Numerically estimate lim, S(x), and interpret the 59- answer. Critical reading SAT
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.
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