Neurology The average weight of a male child’sbrain is 970 grams at age 1 and 1270 grams at age 3.(Source: American Neurological Association)(a) Assuming that the relationship between brainweight y and age t is linear, write a linear model forthe data.(b) What is the slope and what does it tell you aboutbrain weight?(c) Use your model to estimate the average brainweight at age 2.(d) Use your school’s library, the Internet, or someother reference source to find the actual averagebrain weight at age 2. How close was your estimate?(e) Do you think your model could be used to determinethe average brain weight of an adult? Explain.
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.
Neurology The average weight of a male child’s
brain is 970 grams at age 1 and 1270 grams at age 3.
(Source: American Neurological Association)
(a) Assuming that the relationship between brain
weight y and age t is linear, write a linear model for
the data.
(b) What is the slope and what does it tell you about
brain weight?
(c) Use your model to estimate the average brain
weight at age 2.
(d) Use your school’s library, the Internet, or some
other reference source to find the actual average
brain weight at age 2. How close was your estimate?
(e) Do you think your model could be used to determine
the average brain weight of an adult? Explain.
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