a. Plot the following time series. Would the linear or quadratic model fit better? $$\begin{array} { c c c c }
\text { Time period } & y _ { t } & \text { Time period } & y _ { t } \
\hline 1 & 5 & 5 & 50 \
2 & 8 & 6 & 85 \
3 & 14 & 7 & 135 \
4 & 25 & 8 & 190
\end{array}$$ b. Use the regression technique to calculate the linear trend line and the quadratic trend line.
c. Which line fits better?

Question

a. Plot the following time series. Would the linear or quadratic model fit better? $$\begin{array} { c c c c } 
\text { Time period } & y _ { t } & \text { Time period } & y _ { t } \
\hline 1 & 5 & 5 & 50 \
2 & 8 & 6 & 85 \
3 & 14 & 7 & 135 \
4 & 25 & 8 & 190
\end{array}$$ b. Use the regression technique to calculate the linear trend line and the quadratic trend line.
c. Which line fits better?

Quizplus · Accepted Answer

The Answer of a. Plot the following time series. Would the linear or quadratic model fit better? $$\begin{array} { c c c c } 
\text { Time period } & y _ { t } & \text { Time period } & y _ { t } \
\hline 1 & 5 & 5 & 50 \
2 & 8 & 6 & 85 \
3 & 14 & 7 & 135 \
4 & 25 & 8 & 190
\end{array}$$ b. Use the regression technique to calculate the linear trend line and the quadratic trend line.
c. Which line fits better?

A Plot the Following Time Series B Use the Regression Technique to Calculate the Linear Trend