Finding the Linear Correlation Coefficient
L 6.1.3 Quiz: Two-Variable Data and Scatterplots
Question 7 of 10
Which of the following graphs shows a negative linear relationship with a correlation coefficient, $r$, close to -0.5 ?
c.
A. Graph A
B. Graph B
C. Graph C
D. Graph D
Determining if the Correlation is Significant
A set of data is given as follows: X = {3, 4, 5, 6, 7} and Y = {2, 5, 7, 8, 9}. Determine if the correlation between X and Y is significant.
Finding a Regression Line
Determine a power regression for the data given below.
What diameter would give a length of 380.9 ?
Round the numerical values of the function to three decimal places before you compute your final answer.
Round your final answer to one decimal place.
\begin{tabular}{|c|c||c||c||c||c||c|}
\hline Diameter & 13.6 & 16.7 & 20.4 & 24.3 & 25.5 & 27 \\
\hline \hline Length & 205.7 & 239.6 & 278.1 & 317.2 & 328.9 & 343.6 \\
\hline
\end{tabular}