The data referred to in this question were collected from several sales districts across the country.The data represent sales for a maker of asphalt roofing shingles.Information on the following variables is available. 
Partial SPSS regression output of a multiple regression model with sales as the response variable and the other four variables as predictor variables are given below. 
What is a 95% confidence interval for the coefficient of promotional expenditures?
Definitions:
Three Types
A generic categorization term indicating that a particular subject or concept can be divided into three distinct categories.
Affiliation
The need to form relationships and be part of a group, which is a fundamental human motivation.
Homeostasis
The self-regulating process by which biological systems maintain stability while adjusting to conditions that are optimal for survival.
Thermometer
An instrument for measuring and indicating temperature.
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