T10.11. Researchers wondered whether maintaining apatient's body temperature close to normal by heating thepatient during surgery would affect wound infection rates.Patients were assigned at random to twomothermic group (patients' core temperatures were main-tained at near normal, 36.5°C, with heating blankets) andthe hypothermic group (patients' core temperatures wereallowed to decrease to about 34.5°C). If keeping patientswarm during surgery alters the chance of infection, patientsin the two groups should have hospital stays of very differ-ent lengths. Here are summary statistics on hospital stay (innumber of days) for the two groups:groups:thenor-GroupSxNormothermic10412.14.4Hypothermic9614.76.5(a) Construct and interpret a 95% confidence interval forthe difference in the true mean length of hospital stay fornormothermic and hypothermic patients.(b) Does your interval in part (a) suggest that keepingpatients warm during surgery affects the average length ofpatients' hospital stays? Justify your answer.

From the given information we find the solution.

Answered: T10.11. Researchers wondered whether…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In his doctoral thesis, L. A. Beckel (University of Minnesota, 1982) studied the social behavior of river otters during the mating season. An important role in the bonding process of river otters is very short periods of social grooming. After extensive observations, Dr. Beckel found that one group of river otters under study had a frequency of initiating grooming of approximately 1.7 for each 10 minutes. Suppose that you are observing river otters for 40 minutes. Let r = 0, 1, 2, ... be a random variable that represents the number of times (in a 40-minute interval) one otter initiates social grooming of another. Lambda = 6.8 (b) Find the probabilities that in your 40 minutes of observation, one otter will initiate social grooming four times, five times, and six times. (Round your answers to four decimal places.) P(4) = P(5) = P(6) =
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In his doctoral thesis, L. A. Beckel (University of Minnesota, 1982) studied the social behavior of river otters during the mating season. An important role in the bonding process of river otters is very short periods of social grooming. After extensive observations, Dr. Beckel found that one group of river otters under study had a frequency of initiating grooming of approximately 1.7 for each 10 minutes. Suppose that you are observing river otters for 30 minutes. Let r = 0, 1, 2, ... be a random variable that represents the number of times (in a 30-minute interval) one otter initiates social grooming of another. a) Find the probabilities that in your 30 minutes of observation, one otter will initiate social grooming four times, five times, and six times. (Round your answers to four decimal places.) P(4) = P(5) = P(6) = b) Find the probability that one otter will initiate social grooming less than four times during the 30-minute observation period. (Round your answer…

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