Answered: Compute a 95% CI for the mean age (in…

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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Question

100%

Compute a 95% CI for the mean age (in years). (Enter your answer using interval notation. Round your numerical values to two decimal places.)

in years

(b)

Compute a 95% CI for the mean white blood count (in thousands) (use the variable named "First WBC (x 1000) following admission") following admission. (Enter your answer using interval notation. Round your numerical values to two decimal places.)

thousands

(c)

Compute a 90% CI for the mean white blood count (in thousands) (use the variable named "First WBC (x 1000) following admission") following admission. (Enter your answer using interval notation. Round your numerical values to two decimal places.)

thousands

Id
1
2
3
4
LO
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Duration of Hospital
Stay
5
10
6
11
5
14
30
11
17
3
9
3
8
8
5
5
7
4
Age
30
73
40
47
25
82
60
56
43
50
4
22
33
32
Sex
36
Female
69
Female
Female
Female
Female
59 Female
Male
Male
Female
Male
Male
Male
20 Female
Female
Female
Male
Male
Female
First Temperature Following
Admission
99
98
99
98.2
98.5
96.8
99.5
98.6
98
98
97.6
97.8
99.5
98.4
98.4
99
99.2
98
First WBC (× 1,000) Following
Admission
9
6
11
LO
5
10
LO
5
7
8
8
13
8
4
12
15
10
8
7
LO
5
Received
Antibiotic
No
No
No
No
No
Yes
Yes
No
22
No
No
Yes
Yes
No
No
Yes
No
Received Bacterial
Culture
No
Yes
No
No
No
No
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
No
Service
Medical
Medical
Surgery
Surgery
Surgery
Surgery
Medical
Medical
Medical
Surgery
Medical
Surgery
Surgery
Surgery
Surgery
Surgery
Surgery
Surgery

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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What is the best point estimate of the percentage of males among patients discharged from Pennsylvania hospitals?

What is the standard error of the estimate of the percentage of males among patients discharged from Pennsylvania hospitals? (Round your answer to four decimal places.)

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