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 round your anshers to three decimal ploces.(d) What does this confidence intersal lappy about the rieaing time of both the at bandoges: 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 selfadhesive bandages used with an antibiotic applied to the wound. The doctor randomly selected 119 patients to participate in the study and divided them into two groups in Group 11using the bandages preloaded with antibiotic and 50 in Group 2 using the bandages with the same amount of antibiotic applied to the wound first. In both groups, the amount of time, indays, it took for the wound to heal was recorded. In Group 1, the mean healing time was 4.42 days with a standard deviation of 1.5, and the mean for Group 2 was 5.71 days with a tstandard deviation of 1.7.(a) Which of the following is the best way to describe this study?O-Experiment with I treatment: the types of bandages usedO observational studyExperiment with 2 treatments: the bandages with antibiotic and the bandages with antibiotic applied firstO Experiment with 1 treatment: the type of antibiotic used(b) Find the df. Show your work and round your answer down to the nearest whole number.(c) Construct a 95% confidence interval estimate for the difference in true mean healing time in wounds between the bandages with preloaded antibiotic and the bandages with antibioticapplied to the wound first. Show your work and round your answers to three decimal places.(d) what does this confidence interval imply about the healing time of both type of bandages?This interval indicates that, on average, bantages with preloaded antibiotic have an equally likely healing rate than bandages with antibiotic applied to the wound firstO This interval indicates that, on average, bandages with preisaded antibiotic have a faster healing rate than bandages with antibiotic applied to the wound firstThis interval indicates that, on average, bandages with preloaded antibiotic have a slower healing rate than bandages with antibiotic applied to the wound festtrue or false. (e) Determine whether the following statement is true or false.If zero lies in the interval, then there is sufficient evidence of a significant difference between the mean healing times for the 2 different bandagesTrueO False(f) What would happen to the bound on error if the confidence level increased?O It would also increase.It would decrease.It would stay the same.O It would go to zero.

The provided information is as follows:The number of patients are, .Mean of Group 1 is daysMean of…

Answered: In a study of self-adheave bandages, a…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

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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 round your anshers to three decimal ploces.

(d) What does this confidence intersal lappy about the rieaing time of both the at bandoges:

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 119 patients to participate in the study and divided them into two groups in Group 11
using the bandages preloaded with antibiotic and 50 in 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 4.42 days with a standard deviation of 1.5, and the mean for Group 2 was 5.71 days with a t
standard deviation of 1.7.
(a) Which of the following is the best way to describe this study?
O-Experiment with I treatment: the types of bandages used
O observational study
Experiment with 2 treatments: the bandages with antibiotic and the bandages with antibiotic applied first
O Experiment with 1 treatment: the type of antibiotic used
(b) Find the df. Show your work and round your answer down to the nearest whole number.
(c) Construct a 95% confidence interval estimate 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. Show your work and round your answers to three decimal places.
(d) what does this confidence interval imply about the healing time of both type of bandages?
This interval indicates that, on average, bantages with preloaded antibiotic have an equally likely healing rate than bandages with antibiotic applied to the wound first
O This interval indicates that, on average, bandages with preisaded antibiotic have a faster healing rate than bandages with antibiotic applied to the wound first
This interval indicates that, on average, bandages with preloaded antibiotic have a slower healing rate than bandages with antibiotic applied to the wound fest
true or false.

(e) Determine whether the following statement is true or false.
If zero lies in the interval, then there is sufficient evidence of a significant difference between the mean healing times for the 2 different bandages
True
O False
(f) What would happen to the bound on error if the confidence level increased?
O It would also increase.
It would decrease.
It would stay the same.
O It would go to zero.

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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