Describe how the datafile would have been structured by fill…

Describe how the datafile would have been structured by filling in each blank.                (a) Number of rows:                (b) Number of IV coding column(s) (if any):       Values you would find in coding column(s):                (c) Number of data or score column(s):         Label(s) or name(s) of data column(s):

A company wants to test if a new online ad campaign has incr…

A company wants to test if a new online ad campaign has increased the click-through rate (CTR) on their website. They compare the average CTR before and after the campaign launch. Which of the following would be the correct null hypothesis (H0) for this scenario?