The HyTex Company is a direct marketer of stereophonic equipment, personal computers, and other electronic products. HyTex advertises entirely by mailing catalogs to its customers, and all of its orders are taken over the telephone. The company spends a great deal of money on its catalog mailings, and wants to be sure that this is paying off in sales. Therefore, it has collected data on 1000 customers at the end of the current year. For each customer it has data on the following variables: Age (coded as 1 for 30 or younger, 2 for 31 to 55, 3 for 56 or older), Gender (coded as 1 for males, and 2 for females), OwnHome (coded as 1 if customer owns a home, and 2 otherwise), Married (coded as 1 if customer is currently married, and 2 otherwise), Close (coded as 1 if customer lives reasonably close to a shopping area that sells similar merchandise, and 2 otherwise), Salary (combined annual salary of customer and spouse, if applicable), Children (number of children living with the customer), History (coded as “NA” if customer had no dealings with the company before this year, 1 if customer was a low-spending customer last year, 2 if medium-spending, and 3 if high-spending), Catalogs (number of catalogs sent to the customer this year), and AmountSpent (total amount of purchases made by the customer this year). These data are provided in the file P4_7.XLS. Clean all usable data in this file.