A manufacturer produces 1000 lightbulbs an hour from a given machine. An quality control engineer tests a random batch of 40 light bulbs for the average temperature rating of the bulbs. In the sample of 40 bulbs, the average light temperature rating was 2724K (K is degrees Kelvin), with a standard deviation of 18K. Which of the following will give a confidence interval for the true mean temperature rating in degrees Kelvin of bulbs from this machine in the hour?
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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