A researcher examined a sample of rainbow trouttaken from the Spokane River in Washington State,recording their lengths (mm) and weights (grams).For example, one trout was 360 mm long and weighed469 g. Because a scatterplot using length to predict weight showed an exponential relationship, the re-searcher took the log of weight and successfully lin-earized the relationship. Use his regression model log1weight2 = 1.491 + 0.00331length to predict theweight of a 400 mm rainbow trout.A) 2.815 g B) 16.7 g C) 509 gD) 598 g E) 653 g
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.
taken from the Spokane River in Washington State,
recording their lengths (mm) and weights (grams).
For example, one trout was 360 mm long and weighed
469 g. Because a
searcher took the log of weight and successfully lin-
earized the relationship. Use his regression model
weight of a 400 mm rainbow trout.
A) 2.815 g B) 16.7 g C) 509 g
D) 598 g E) 653 g
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