11.4 You conduct a new email incentive test where you offer an additional 10,000 miles versus the control offer. The result of the test and control panels are as shown below: MR Offer Impressions Cicks Click Rate Apps Response Rate 190,000 4,990 2.62% 104 .0547% 190,000 5,380 2.83% 163 Test Panel Gold Control 10,000 Gold Test 20,000 Determine if the test outperformed the control in terms of click through rate based on 95% confidence level. 11.5 Your current banner ad yields a click through rate of .25%. You are going to test changing the shape of the button on the banner ad. a) How many impressions would you need to read a10% lift in the CTR for this test? b) Do you think it would even be feasible to get a 10% lift in the CTR by simply changing the style of the button. c) How many impression would you need to order to be able to read a 3% lift in the CTR? .0858%