JC Penney Is a Large Retailer with Hundreds of Outlets

Multiple Choice

JC Penney is a large retailer with hundreds of outlets across the United States. An executive manager is interested in how promotional spending affects quarterly sales figures in North Carolina where sales have been dismal in a number of quarters. Her hypothesis is that promotional spending does not affect quarterly sales in North Carolina. What is a null hypothesis in a research study based upon?

A) educated guess about a population study
B) educated guess about a sample study
C) educated guess about a population parameter
D) educated guess about a sample statistic