Online advertising. Many businesses use a variety of channels for online advertising, such as social media, display, paid research, and retargeting, in order to reach consumers efficiently and affordably. A small company made its first-time online advertisement last month in hopes of increasing its revenue. The company then summarizes its daily revenue (in $) for eight random days of that month in comparison to eight random days’ revenues from the previous month as follows:

Day Before Ad After Ad 1 941 1012 2 1034 1059 3 1003 1015 4 937 966 5 1005 959 6 879 1104 7 957 1010 8 1035 1100

a) Identify the procedure you would use to assess the effectiveness of online advertising, and check to see if the conditions allow for the use of that procedure.

b) Test an appropriate hypothesis, and state your conclusion.