Use the Data Given Below to Answer the Following Question(s)

question 13

Multiple Choice

Use the data given below to answer the following question(s) .
The table provided below gives the sales details of the number of android smart phones at an electronic retail store for the past 6 weeks. The time series appears to be relatively stable, without trend, seasonal, or cyclical effects. (Hint: Optimize α value in 0.1 increments) $$\begin{array} { | c | c | } \hline \text { Week } & \text { Units sold } \\\hline 1 & 88 \\\hline 2 & 44 \\\hline 3 & 54 \\\hline 4 & 65 \\\hline 5 & 72 \\\hline 6 & 85 \\\hline\end{array}$$
-In the linear trend equation Ft+k = at + btk, identify the term that signifies the trend.

• A) bt
• B) k
• C) at
• D) Ft + k

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Definitions:

Standard Deviation (σ)

An approach to gauge the level of inconsistency or scatter within data values.

Mean (μ)

The mathematical average of a set of numbers, calculated by adding all the numbers together and then dividing by the count of those numbers.

Standard Deviation (σ)

A measure of the amount of variation or dispersion of a set of values; a low standard deviation indicates that the values tend to be close to the mean, while a high standard deviation indicates that the values are spread out over a wider range.

Mean (μ)

The average of a set of numbers, calculated by dividing the sum of these numbers by the count of numbers in the set.