When a Time Series Is Analyzed by the Model Y_t

question 12

Multiple Choice

When a time series is analyzed by the model y_t = T_t × S_t × I_t, which of the following is valid?

• A) Setting the estimated value of T_t and S_t at 1.
• B) Setting the estimated value of T_t at 1.
• C) Setting the estimated value of I_t at 1.
• D) Setting the estimated value of S_t at 1.

---

Definitions:

Hypotheses

Theoretical statements set forth for experimentation that predict a possible relationship between two or more variables, which may include both null and alternative hypotheses.

Interquartile Range

A measure of statistical dispersion, equal to the difference between the upper and lower quartiles, representing the middle 50% of the data.

Outliers

Data points that significantly differ from other observations in a data set, often indicating measurement error or a novel phenomena.

Range

The difference between the highest and lowest values in a dataset, providing a measure of the data's spread or variability.