TABLE 16-8
the President of a Chain of Department

question 88

Short Answer

TABLE 16-8
The president of a chain of department stores believes that her stores' total sales have been showing a linear trend since 1980. She uses Microsoft Excel to obtain the partial output below. The dependent variable is sales (in millions of dollars), while the independent variable is coded years, where 1980 is coded as 0, 1981 is coded as 1, etc.
$\begin{array} { |l l| }\hline \text {SUMMARY}\\ \text {OUTPUT}\\ \text {Regression Statistics}\\ \text { MultipleR } & 0.604 \\ \text { R Square } & 0.365 \\ \text { Adjusted R Square } & 0.316 \\ \text { Standard Error } & 4.800 \\ \text { Observations } & 17\\\\\text {Coefficients}\\\text {Intercept} & 31.2\\\text {Coded Year }&0.78\\\hline \end{array}$

-Referring to Table 16-8, the forecast for sales (in millions of dollars) in 2000 is ______.

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Definitions:

M/Z Value

Mass-to-charge ratio, a key concept in mass spectrometry used to identify molecules by their mass and charge.

M+2 Peak

Denotes a secondary peak in mass spectrometry, two units higher than the molecular ion peak, often indicative of the presence of isotopes like sulfur-32 or the incorporation of two chlorine or bromine atoms.

MS Peak

A representation of a specific mass-to-charge ratio detected in mass spectrometry, indicating the presence of a particular ion or molecule fragment.

Major Isotopes

The most abundant isotopes of an element, which have a significant presence in nature.