Instruction 14-9
the President of a Chain of Department Stores

question 6

Short Answer

Instruction 14-9
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 1990 is coded as 0, 1991 is coded as 1, etc.
$$\begin{array}{l}\text { SUMMAROUIPUT }\\\begin{array} { l l } \text { Regression Statistics } & \\\text { MultipleR } & 0.604 \\\text { R Square } & 0.365 \\\text { Adjusted R Square } & 0.316 \\\text { standard Error } & 4.800 \\\text { Observations } & 17 \\& \\& \text { Coefílients } \\\text { Intercept } & 31.2 \\\text { Coded Year } & 0.78\end{array}\end{array}$$
-Referring to Instruction 14-9,the estimate of the amount by which sales (in millions of dollars)is increasing each year is _______.

Comprehend the procedure for testing null hypotheses in ANOVA, including significance levels and p-values.

Grasp the concept and calculation of the mean square due to treatments (MSTR) in ANOVA.

Understand the degrees of freedom in ANOVA, including how to calculate them for the numerator and denominator.

Recognize and explain the required assumptions for conducting an ANOVA test.

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Definitions:

Births Spacing

The practice or policy of controlling the interval between the birth of children in a family.

Population Growth

The increase in the number of individuals in a population, often measured in terms of birth rates, death rates, immigration, and emigration.

Sterilization

The process of eliminating all forms of life, including microorganisms, from an object or area, typically using chemical agents, heat, or radiation.

Contraceptive Use

The practice of utilizing methods or devices to prevent pregnancy as part of reproductive health and family planning.