The Following Is Part of the Results of a Regression

question 133

Essay

The following is part of the results of a regression analysis involving sales Y in millions of dollars), advertising expenditures X1 in thousands of dollars), and number of sales people X2) for a corporation:
ANALYSIS OF VARIANCE
Source of Variation
Degrees of Freedom
Sum of Squares
Mean
Square F
Regression 2 822.088
Error 7 736.012
a. At α = 0.05 level of significance, test to determine if the model is significant. That is, determine if there exists a significant relationship between the independent variables and the dependent variable.
b. Determine the multiple coefficient of determination.
c. Determine the adjusted multiple coefficient of determination.
d. What has been the sample size for this regression analysis?

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Definitions:

Facial-feedback Hypothesis

The theory that suggests that facial expressions can influence emotional experiences.

Depressed

A condition characterized by a reduced mood and lack of interest in actions, influencing an individual's thoughts, actions, emotions, and overall health.

Frowns

Facial expressions indicating displeasure, concern, or disapproval, usually characterized by a furrowing of the brow.

Sighs

Deep and long breaths that often express relief, tiredness, or similar emotions, and serve physiological functions such as lung inflation.