Use this sample data to construct a 90% confidence interval for the mean number of targeted industrial chemicals to be found in an infant's blood.
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.
In Oct. 2008, scientists tested cord blood samples for 20 newborn infants in USA. The scientists were testing for 430 harmful chemicals linked to brain and nervous toxicity.
The numbers below showed many of the targeted chemicals found in each infant's cord blood.
79 145 147 160 116 100 159 151 156 126
137 83 156 94 121 144 123 114 139 99
Use this sample data to construct a 90% confidence interval for the mean number of targeted industrial chemicals to be found in an infant's blood.
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