In a study of self-adhesive bandages, a doctor wanted to see if there was truly a...

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In a study of self-adhesive bandages, a doctor wanted to see if there was truly a difference in the healing time between the self-adhesive bandages preloaded with antibiotic and the self-adhesive bandages used with an antibiotic applied to the wound. The doctor randomly selected 100 patients to participate in the study and divided them into two groups of 50- Group 1 using the bandages preloaded with antibiotic and Group 2 using the bandages with the same amount of antibiotic applied to the wound first. In both groups, the amount of time, in days, it took for the wound to heal was recorded. In Group 1, the mean healing time was 1.44 days with a standard deviation of 0.70, and the mean for Group 2 was 2.53 days with a standard deviation of 0.95. LA USE SALT (a) Which of the following is the best way to describe this study? O Experiment with 1 treatment: the types of bandages used Experiment with 2 treatments: the bandages with antibiotic and the bandages with antibiotic applied first O Observational study O Experiment with 1 treatment: the type of antibiotic used i (b) Calculate the critical value we would use for a 99% confidence interval for difference in the population means? (Use a table or technology. Round your answer to three decimal places.) x (c) Find the 99% confidence interval for the difference in true mean healing time in wounds between the bandages with preloaded antibiotic and the bandages with antibiotic applied to the wound first. (Round your answers to two decimal places.) We can be 99% confident that the difference in true mean healing time in wounds for the bandages with preloaded antibiotic and the bandages with antibiotic applied to the wound first is between In a study of self-adhesive bandages, a doctor wanted to see if there was truly a difference in the healing time between the self-adhesive bandages preloaded with antibiotic and the self-adhesive bandages used with an antibiotic applied to the wound. The doctor randomly selected 100 patients to participate in the study and divided them into two groups of 50- Group 1 using the bandages preloaded with antibiotic and Group 2 using the bandages with the same amount of antibiotic applied to the wound first. In both groups, the amount of time, in days, it took for the wound to heal was recorded. In Group 1, the mean healing time was 1.44 days with a standard deviation of 0.70, and the mean for Group 2 was 2.53 days with a standard deviation of 0.95. LA USE SALT (a) Which of the following is the best way to describe this study? O Experiment with 1 treatment: the types of bandages used Experiment with 2 treatments: the bandages with antibiotic and the bandages with antibiotic applied first O Observational study O Experiment with 1 treatment: the type of antibiotic used i (b) Calculate the critical value we would use for a 99% confidence interval for difference in the population means? (Use a table or technology. Round your answer to three decimal places.) x (c) Find the 99% confidence interval for the difference in true mean healing time in wounds between the bandages with preloaded antibiotic and the bandages with antibiotic applied to the wound first. (Round your answers to two decimal places.) We can be 99% confident that the difference in true mean healing time in wounds for the bandages with preloaded antibiotic and the bandages with antibiotic applied to the wound first is between

Answer rating: 100% (QA)

From the given data Group 1 Sample size n 50 Mean X 144 Stan... View the full answer