The Nielsen Company reported that 30% of Millennials (ages 21–34) order groceries online (source: “The future of grocery: E-commerce, digital technology and changing shopper preferences around the world,” www.nielsen. com, Apr. 29, 2015). Suppose a U.S. grocery company wishes to test whether the Nielsen figure applies in its market area. To do this, it surveys 400 Millennials and finds that 132 currently order groceries online.

a. State the appropriate null and alternative hypotheses.
b. Based on an alpha = 0.05 level, do the data from the sample indicate that the Millennials in this store’s market area order groceries online to a greater or lesser extent than the 30% that the Nielson study indicated?