A cleaning service sends crews to residential homes on either a once-a-month or

Question

A cleaning service sends crews to residential homes on either a once-a-month or twice-a-month schedule, depending on the customer's preference. The owner would like to predict the amour of time (in minutes) required to clean a house based on the square footage of the house, the total number of rooms in the house, whether or not the household has children, and the frequenc of the cleaning schedule. Data from randomly selected homes are given in the accompanying table. Complete parts a through d below. ?Click the icon to view the data table. a. Using technology, construct a regression model using all of the independent variables (Let variable Ch be the dummy variable for the Children variable. Assign a 1 if the household has children. Also, let variable Fr be the dummy variable for the frequency. Assign a 1 to a frequency of twice-a-month.) Complete the regression equation for the model below where y= Time (min), x1 = Square Feet, X2-Rooms. x3-Ch, and X4-Fr y= 110.56 + (-0.02)x1 + (741)x2 + (2860):3 + ( -1.14)X4 (Round to two decimal places as needed.) b. Interoret the meanina of the rearession coefficient for the Rooms. Children. and Freauencv variables. Select the correct choice below and fill in the answer boxes to complete vour choice

Explanation / Answer

d) from above least sqaure equation:

predicted average tme =110.56+(-0.02)*2213+7.41*12+28.60*1+(-1.14)*1=182.7

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