The Method of Least Squares Is Used on Time-Series Data

question 201

Multiple Choice

The method of least squares is used on time-series data for

• A) deseasonalising the data.
• B) exponentially smoothing a series.
• C) obtaining the trend equation.
• D) eliminating irregular movements.

---

Definitions:

Sample Mean

The sample mean is the average value in a sample, calculated by adding all the sample values together and dividing by the number of samples, representing the central tendency of the sample.

Binomial Probability

The probability of achieving a specific number of successes in a fixed number of independent trials, where each trial has two possible outcomes.

Normal Curve

A bell-shaped curve depicting the distribution of many types of data; most scores are near the mean, with fewer scores toward the extremes.

Normal Distribution

In this probability distribution, symmetry is observed around the mean, illustrating that nearer data points are more common than distant ones.