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TABLE 14-6 One of the Most Common Questions of Prospective House Buyers

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TABLE 14-6
One of the most common questions of prospective house buyers pertains to the average cost of heating in dollars (Y) . To provide its customers with information on that matter, a large real estate firm used the following 4 variables to predict heating costs: the daily minimum outside temperature in degrees of Fahrenheit (X1) , the amount of insulation in inches (X2) , the number of windows in the house (X3) , and the age of the furnace in years (X4) . Given below are the EXCEL outputs of two regression models.
Model 1
TABLE 14-6 One of the most common questions of prospective house buyers pertains to the average cost of heating in dollars (Y) . To provide its customers with information on that matter, a large real estate firm used the following 4 variables to predict heating costs: the daily minimum outside temperature in degrees of Fahrenheit (X<sub>1</sub>) , the amount of insulation in inches (X<sub>2</sub>) , the number of windows in the house (X<sub>3</sub>) , and the age of the furnace in years (X<sub>4</sub>) . Given below are the EXCEL outputs of two regression models. Model 1 Note: 2.96869E-05 = 2.96869×10<sup>-5</sup> Model 2 Note: 2.9036E-06 = 2.9036×10<sup>-6</sup> -Referring to Table 14-6, what is your decision and conclusion for the test H<sub>0</sub> : β<sub>2</sub> = 0 vs. H<sub>0</sub> : β<sub>2</sub> < 0 at the α = 0.01 level of significance using Model 1? A) Do not reject H<sub>0 </sub>and conclude that the amount of insulation has a linear effect on heating costs. B) Reject H<sub>0 </sub>and conclude that the amount of insulation does not have a linear effect on heating costs. C) Reject H<sub>0 </sub>and conclude that the amount of insulation has a negative linear effect on heating costs. D) Do not reject H<sub>0 </sub>and conclude that the amount of insulation has a negative linear effect on heating costs. Note: 2.96869E-05 = 2.96869×10-5
Model 2
TABLE 14-6 One of the most common questions of prospective house buyers pertains to the average cost of heating in dollars (Y) . To provide its customers with information on that matter, a large real estate firm used the following 4 variables to predict heating costs: the daily minimum outside temperature in degrees of Fahrenheit (X<sub>1</sub>) , the amount of insulation in inches (X<sub>2</sub>) , the number of windows in the house (X<sub>3</sub>) , and the age of the furnace in years (X<sub>4</sub>) . Given below are the EXCEL outputs of two regression models. Model 1 Note: 2.96869E-05 = 2.96869×10<sup>-5</sup> Model 2 Note: 2.9036E-06 = 2.9036×10<sup>-6</sup> -Referring to Table 14-6, what is your decision and conclusion for the test H<sub>0</sub> : β<sub>2</sub> = 0 vs. H<sub>0</sub> : β<sub>2</sub> < 0 at the α = 0.01 level of significance using Model 1? A) Do not reject H<sub>0 </sub>and conclude that the amount of insulation has a linear effect on heating costs. B) Reject H<sub>0 </sub>and conclude that the amount of insulation does not have a linear effect on heating costs. C) Reject H<sub>0 </sub>and conclude that the amount of insulation has a negative linear effect on heating costs. D) Do not reject H<sub>0 </sub>and conclude that the amount of insulation has a negative linear effect on heating costs. Note: 2.9036E-06 = 2.9036×10-6
-Referring to Table 14-6, what is your decision and conclusion for the test H0 : β2 = 0 vs. H0 : β2 < 0 at the α = 0.01 level of significance using Model 1?

Definitions:

Refractory Period

A period immediately following stimulation during which a nerve or muscle is unresponsive to further stimulation.

Action Potential

A brief electrical impulse that enables the transmission of signals along the neuron, crucial for nerve impulse propagation.

Above-Threshold

Pertaining to a stimulus strength that is sufficient enough to be detected or to produce a response.

Depolarizing Current

An electrical current that reduces the membrane potential of a neuron, making it more likely to fire an action potential.

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