A Clothing Manufacturer Traditionally Makes Sweatshirts from Three Different Fabrics

Multiple Choice

A clothing manufacturer traditionally makes sweatshirts from three different fabrics: A,B and C.Over the years,the percentages sold of each fabric were 50,35,and 15,respectively.Recently,the manufacturer began producing running suits from the same three fabrics.During the first three months of production,the company received orders for 6,500 suits made from fabric A,3,400 from fabric B,and 2,700 from fabric C.What is the appropriate test to determine whether sales results of the new running suit are similar to what would be expected given the previous sales history of sweatshirts made of the three fabrics?

A) Regression analysis
B) z-test for comparing sample mean against a standard
C) Chi-square test
D) z-test for comparing sample proportion against a standard
E) None of these are correct.