Hello Tutor, My Name is Nathan and I am doing some volunteer studying on a review guide before my exam this Friday. Can you help me solve these couple questions, I don't understand them. Thanks -Nathan

Question 4 (1 point) A restaurant wants to test a new in store marketing scheme in a small number of scores before rolling it out nationwide. The new ad promotes = premium drink that they want to increase the sales of. $ locations are chosen at random and the number of drinks sold are recorded for 2 months before the new ad campaign and 2 months after. The average difference in the sales quantity (after : before) is|107 754 with a standard deviation of 57.215. When calculating a 90%% confidence interval to estimate the true difference in nationwide sales quantity before the ad campaign and after, what is the margin of error? (1 26.3767 (2) 34.9605 ( 3) 35.4647 () 41 19.0717 (015) 31.3729 Question 5 (1 point) Researchers in the corporate office of an airline wonder if there is a significant difference between the cost of a flight on Priceline.com vs. the cost of the same flight on the airline's own website. A random sample of 6 flights were tracked on Priceline.com and the airline's website and the mean difference in price (Priceline.com Airline Site) was $ 51.971 with a standard deviation of 511.1065 Create a 99/ confidence interval for the true average difference in costs between the vendors. () 1) ( 70 2536, 35.6884 2 (-56.5052. 47 .4368 3) ( 68.7813. 35.1607) () 4) (70.2536. -33.6884) ( 5) (-56.0081, 47.9359) Question 6 (1 point) A restaurant wants to test a new in mall number of scores before rolling it ou remium drink that they want to increase and the number of drinks sole campaign and a months after. The 95% trage difference in nationwide sales quantit 13.84 8.31). Which of the following is the sWere calculated as after ad campaign " before ad cam Q 1 /here is not as before or after the a heleverage sales quantity () 2) Ive are 95% contic is positivel les quantity for all ad campaign We are 9510 confide stores is negative. sales quantity for all (0) 4) We are 95%% confide stores is negatively quantity campaign We are 95%% confident stores is positive, with th quantity forall