An experiment was performed on a certain metal to determine if the strength is a function of heating time.Results based on 10 metal sheets are given below.Use the simple linear regression model. = 30 = 104 = 40 = 178 = 134 Calculate the correlation coefficient.
A).778
B).252
C)1.000
D).882

Question

An experiment was performed on a certain metal to determine if the strength is a function of heating time.Results based on 10 metal sheets are given below.Use the simple linear regression model.  = 30  = 104  = 40  = 178  = 134 Calculate the correlation coefficient.
A).778 
B).252 
C)1.000 
D).882

Quizplus · Accepted Answer

We need to calculate the correlation coefficient between heating time and strength of the metal. Using a calculator or statistical software, we find that the correlation coefficient is 0.882, which is closest to answer choice D. The correlation coefficient indicates a strong positive linear relationship between heating time and strength of the metal.

An Experiment Was Performed on a Certain Metal to Determine