The article cited in Example 1.2 also gave the accompanyingstrength observations for cylinders:6.1 5.8 7.8 7.1 7.2 9.2 6.6 8.3 7.0 8.37.8 8.1 7.4 8.5 8.9 9.8 9.7 14.1 12.6 11.2a. Construct a comparative stem-and-leaf display(see the previous exercise) of the beam and cylinderdata, and then answer the questions in parts(b)–(d) of Exercise 10 for the observations oncylinders.b. In what ways are the two sides of the display similar?Are there any obvious differences between the beamobservations and the cylinder observations?c. Construct a dotplot of the cylinder data.
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.
The article cited in Example 1.2 also gave the accompanying
strength observations for cylinders:
6.1 5.8 7.8 7.1 7.2 9.2 6.6 8.3 7.0 8.3
7.8 8.1 7.4 8.5 8.9 9.8 9.7 14.1 12.6 11.2
a. Construct a comparative stem-and-leaf display
(see the previous exercise) of the beam and cylinder
data, and then answer the questions in parts
(b)–(d) of Exercise 10 for the observations on
cylinders.
b. In what ways are the two sides of the display similar?
Are there any obvious differences between the beam
observations and the cylinder observations?
c. Construct a dotplot of the cylinder data.
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