A Time Series Is Shown in the Table Below A Plot the Time Series to Determine Which of the

question 62

Essay

A time series is shown in the table below: $$\begin{array} { | c | c | } \hline \text { Time period } & y _ { t } \\\hline 1 & 48 \\2 & 50 \\3 & 46 \\4 & 42 \\5 & 40 \\6 & 32 \\7 & 34 \\8 & 26 \\9 & 21 \\10 & 13 \\\hline\end{array}$$ a. Plot the time series to determine which of the trend models appears to fit better.
b. Use the regression technique to calculate the linear trend line and the quadratic trend line. Which line fits better? Use the best model to forecast the value of y for time period 7.

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Definitions:

Before Meals

This term is commonly used in medical prescriptions and dietary advice to signify that a medication or action should be taken prior to eating.

Abbreviation

A shortened form of a word or phrase, used to simplify written and spoken communication.

Off-Label Use

The prescription of pharmaceuticals for an unapproved indication or in an unapproved age group, dosage, or route of administration.

Controlled Clinical Trials

Rigorous experiments that compare the effects of a specific treatment or intervention to a control group, in order to evaluate its effectiveness and safety.