Statistics students in Oxnard College sampled 11 textbooks in the Condor bookstore, and recorded number of pages in each textbook and its cost. The bivariate data is shown below, Number of Pages (xx) Cost(yy) 204 19.32 810 86.8 253 32.24 948 90.84 455 41.4 466 53.28 282 43.56 955 90.4 642 62.36 827 88.16 683 67.64 A student calculates a linear model yy = xx + . (Please show your answers to two decimal places) Use the model above to estimate the cost when number of pages is 777 Cost = $ (Please show your answer to 2 decimal places.)
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.
| Number of Pages (xx) | Cost(yy) |
|---|---|
| 204 | 19.32 |
| 810 | 86.8 |
| 253 | 32.24 |
| 948 | 90.84 |
| 455 | 41.4 |
| 466 | 53.28 |
| 282 | 43.56 |
| 955 | 90.4 |
| 642 | 62.36 |
| 827 | 88.16 |
| 683 | 67.64 |
A student calculates a linear model
yy = xx + . (Please show your answers to two decimal places)
Use the model above to estimate the cost when number of pages is 777
Cost = $ (Please show your answer to 2 decimal places.)
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