[Solved] 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. Which of the four explanatory variables seems to be the least significant in the model? A)Expenditures B)Accounts C)Competing brands D)District potential Abdominal Surgery: A surgical procedure carried out on organs within the abdomen, including the stomach, liver, gallbladder, and intestines. Blood Tinged Urine: Urine that contains blood, visible to the naked eye or under a microscope, indicating possible underlying medical conditions. Urinalysis: A laboratory test analyzing the content of urine for medical diagnostic purposes. Cyanosis: A bluish or purplish discoloration of the skin and mucous membranes due to insufficient oxygen in the blood.