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