13.24 Construction Projects In a study to examine the relationship between the time required to complete a

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13.24 Construction Projects In a study to examine the relationship between the time required to complete a construction project and several pertinent independent variables, an analyst compiled a list of four variables that might be useful in predicting the time to completion. These four variables were size of the contract, x (in $1000 units), number of work- days adversely affected by the weather x2, number of subcontractors involved in the project x4, and a variable x3 that measured the presence (x3 = 1) or absence (x = 0) of a workers' strike during the construction. Fifteen construction projects were randomly chosen, and each of the four variables as well as the time to completion were measured.

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An analysis of these data using a first-order model in X1, X2, X3, and x4 produced the following printout. Give a complete analysis of the printout and interpret your results. What can you say about the apparent contribu- tion of x and x2 in predicting y? image text in transcribed

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