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- In a study of self-adheave bandages, a doctor wamed to moe if there was truly a diterence in the healing time between the self-adhesive bandyger preiagded with antikiedic ind the seif adhetive bandages used with an antiblotic applied to the wound. The doctor randomiy selected 119 patients to partioipate in the stuify and divided theon into thro qoups. days, it took for the wound to heal was recorded. In Groug 1. the mean healing time was 4.42 days with a itandard deviation of 1.5, and the mean for Group 2 was 3.71 dayi with a standard deviation of 1.7 (a) Which of the following is the best way to describe this study? 1.Experiment with I treatment the types of bandages used Obseryational utudy Experiment with 2 treatments: the handages with antibetic and the bandajes with antebiotic applied fint. Experiment with 1 theatmant: the type of antibilotic usad (b) Find the df, Show your wotk and round yaur answer down to the nearest whele number. applied to the vound first. show your work and…A research center claims that 30% of adults in a certain country would travel into space on a commercial flight if they could afford it. In a random sample of 700 adults in that country, 34% say that they would travel into space on a commercial flight if they could afford it. At α=0.01, is there enough evidence to reject the research center's claim? Complete parts (a) through (d) below.In the Sanatorium For Acute Intellectual Malnutrition, a nourishing twelve course Christmas Exam is finally administered to 20 starving statistics orphans who are seated in a circle. Having been deprived to the point of not feeling hungry, each student randomly shoves the exam to the fellow on his right or the one on his left. How many orphans on average will end up without a test?
- Due to a manufacturing error,ten cans of regular soda were accidentally filled with diet soda and placed into a 36-pack. Suppose that two cans are randomly selected from the 36-pack. Complete parts (a) through (c).If a manufacturer is trying to put together a sample collection of her safetyproduct and order is not important, how many combinations can becreated with 15 items that will be placed in packages containing fiveitems? If order is important, how many permutations can be created?For quality control purposes, a local toy company inspects two yo-yo’s out of everyshipment containing 20 yo-yo’s. How many ways can a sample of two yo-yo’s beselected from each shipment?
- A machine puts out 16 imperfect articles in a sample of 500. After the machine is over-hauled, it puts out 3 imperfect articles in a batch of 100. Has the machine improved?Only 41% of registered voters voted in the last election. Will voter participation be even lower for the upcoming election? H0: Ha:In a sample of 300 days, St. Petersburg has 171foggy days. In an independent sample of 200 days,Stockholm has 92 foggy days. Compute the 95% CIfor the difference between the two populationproportions of foggy days.