A Research Analyst Believes That a Positive Relationship Exists Between

Multiple Choice

A research analyst believes that a positive relationship exists between a firm's advertising expenditures and its sales. For 65 firms, she collects data on each firm's yearly advertising expenditures and its sales. She calculates a Spearman rank correlation coefficient of 0.45. At the 5% confidence level, which of the following is the correct conclusion about the relationship between advertising and sales?

A) Reject the null hypothesis; we cannot conclude advertising and sales are correlated.
B) Do not reject the null hypothesis; we can conclude advertising and sales are correlated.
C) Reject the null hypothesis; we can conclude advertising and sales are correlated.
D) Do not reject the null hypothesis; we cannot conclude advertising and sales are correlated.