Colorectal surgery is associated with a high rate of surgical site infection (SSI). Complications arising from SSI significantly increase an individual's length of hospital stay, reduce quality of life, and can also lead to additional health care needs. Outcomes of 2,919 colorectal surgeries were collected for research, including age and whether an individual developed a surgical site infection. Medical researchers would like to use this sample data to learn about health outcomes for colorectal surgery.One question medical researchers were hoping to answer is whether the difference in the ages of colorectal surgery patients who develop SSI and those who do not is too great to have resulted from sampling error alone. Perform a two-sample t-test for comparing two population means to answer this question. Enter the requested values below, rounded to three decimal places as needed.Difference of means:-1.372Standard Error:1.130Test Statistic:Degrees of freedom:P-value: Because both assumptions have been met, we can pursue the analysis and determine if the data provideconvincing evidence that the mean age for patients who do not develop surgical site infection (SSI) is differentthan the mean age of patients who do develop surgical site infection. Write the hypotheses, with patients whodo not develop SSI assigned to group 1 and patients who do develop SSI assigned to group 2. (Enter != for #as needed.)H = mean Age of patients who do not develop SSIH2= mean Age of patients who do develop SIHo41-23D0Use a significance level of a 0.05.Part 5 of 6Recall our hypotheses and summary statistics.Ho: H1 - H2 = 0H: - H2 #0Surgical Site Infection (S SI)Sample SizeMean AgeStandard deviationNo Infection2,67852.45616.891Yes Infection24153.82815.852In SALT, click on the "Inferential Statistics" page.

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Description: Colorectal surgery is associated with a high rate of surgical site infection (SSI). Complications arising from SSI significantly increase an individual's length of hospital stay, reduce quality of life, and can also lead to additional health care nee

Given, Surgical site infection (SSI) sample size Mean Age Standard deviation No infection 2678…

Answered: Colorectal surgery is associated with a…

MATLAB: An Introduction with Applications

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ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

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Colorectal surgery is associated with a high rate of surgical site infection (SSI). Complications arising from SSI significantly increase an individual's length of hospital stay, reduce quality of life, and can also lead to additional health care needs. Outcomes of 2,919 colorectal surgeries were collected for research, including age and whether an individual developed a surgical site infection. Medical researchers would like to use this sample data to learn about health outcomes for colorectal surgery. One question medical researchers were hoping to answer is whether the difference in the ages of colorectal surgery patients who develop SSI and those who do not is too great to have resulted from sampling error alone. Perform a two-sample t-test for comparing two population means to answer this question.

Enter the requested values below, rounded to three decimal places as needed.
Difference of means:
-1.372
Standard Error:
1.130
Test Statistic:
Degrees of freedom:
P-value:

Because both assumptions have been met, we can pursue the analysis and determine if the data provide
convincing evidence that the mean age for patients who do not develop surgical site infection (SSI) is different
than the mean age of patients who do develop surgical site infection. Write the hypotheses, with patients who
do not develop SSI assigned to group 1 and patients who do develop SSI assigned to group 2. (Enter != for #
as needed.)
H = mean Age of patients who do not develop SSI
H2
= mean Age of patients who do develop SI
Ho
41-23D0
Use a significance level of a 0.05.
Part 5 of 6
Recall our hypotheses and summary statistics.
Ho: H1 - H2 = 0
H: - H2 #0
Surgical Site Infection (S SI)
Sample Size
Mean Age
Standard deviation
No Infection
2,678
52.456
16.891
Yes Infection
241
53.828
15.852
In SALT, click on the "Inferential Statistics" page.

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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Given,

Surgical site infection (SSI)	sample size	Mean Age	Standard deviation
No infection	2678	52.456	16.891
Yes infection	241	53.828	15.852

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