date, you have staunchly avoided placing any advertisements on your
website. However, with revenues declining, you are considering relenting
on this position. Before making a full commitment, you decide to try to
determine whether the presence of ads has any negative impacts on your
sales. Therefore, you make a deal with an advertiser to show a 10-second
pop-up ad (that pops up and plays when the site is first visited and
then becomes a banner ad on the page) intermittently over a period of
one month. Suppose you’ve decided to show the ad during business hours
(9:00 a.m.– 5:00 p.m.), and not show the ad any other time during the
- What are the “subjects” in this (field) experiment?
- What is the treatment?
- What is the relevant outcome?
- Is treatment assignment random?
for each visitor to your site, whether the visitor sees the ad is
determined randomly. After the month is completed, you have the
Mean sales when ad was shown: $27.67
Standard deviation of sales when ad was shown: $19.13
Number of times ad was shown: 8,172
Mean sales when ad was not shown: $28.21
Standard deviation of sales when ad was not shown: $19.82
Number of time ad was not shown: 10,437
Does showing the ad affect your sales? Explain your reasoning.
the data from above, the advertiser claims there is evidence that
running the ads may actually improve your sales. Is there evidence for
this? Explain your reasoning, why or why not. I need a proper calculations for this assignment.