(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.) (6.18,8.94) x 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.) (6.42,8.70) x thousands

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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100%

How do you find (b.), (c.), and (g.)??

(a) Compute a 95% CI for the mean age (in years). (Enter your answer using interval notation. Round your numerical values to two decimal places.)
(32.94, 49.54)
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.)
(6.18,8.94) x 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.)
(6.42,8.70) x thousands
(d) What is the relationship between your answers to (b) and (c)?
The 90% confidence interval is wider than the 95% confidence interval since we are requiring more confidence.
o The 90% confidence interval is narrower than the 95% confidence interval since we are requiring less
confidence.
The 90% confidence interval is narrower than the 95% confidence interval since we are requiring more
confidence.
The 90% confidence interval is wider than the 95% confidence interval since we are requiring less confidence.
(e) What is the best point estimate of the percentage of males among patients discharged from Pennsylvania hospitals?
40
%
(f) 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.)
9.7980
%
(g) Provide a 95% CI for the percentage of males among patients discharged from Pennsylvania hospitals. (Enter your answer using interval notation. Round your numerical values to two decimal places.)
(20.80, 59.20)
X %
Transcribed Image Text:(a) Compute a 95% CI for the mean age (in years). (Enter your answer using interval notation. Round your numerical values to two decimal places.) (32.94, 49.54) 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.) (6.18,8.94) x 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.) (6.42,8.70) x thousands (d) What is the relationship between your answers to (b) and (c)? The 90% confidence interval is wider than the 95% confidence interval since we are requiring more confidence. o The 90% confidence interval is narrower than the 95% confidence interval since we are requiring less confidence. The 90% confidence interval is narrower than the 95% confidence interval since we are requiring more confidence. The 90% confidence interval is wider than the 95% confidence interval since we are requiring less confidence. (e) What is the best point estimate of the percentage of males among patients discharged from Pennsylvania hospitals? 40 % (f) 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.) 9.7980 % (g) Provide a 95% CI for the percentage of males among patients discharged from Pennsylvania hospitals. (Enter your answer using interval notation. Round your numerical values to two decimal places.) (20.80, 59.20) X %
Id
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6
7
8
9
10
11
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13
14
15
16
17
18
19
20
21
22
|
23
24
25
Duration of Hospital Stay
5
10
6
11
5
14
30
11
17
3
9
3
8
8
5
5
7
4
3
7
9
11
11
9
4
Age
30
73
40
82
60
47 Female
56
25 Female
43
50
4
22
32
36
69
Sex
47
Female
59 Female
Female
11
Male
19
67
Male
33 Female
41
Male
20 Female
Female
Male
Male
Male
Female
Male
22 Female
Male
Male
Male
Male
Male
Female
43 Female
Male
First Temperature Following Admission First WBC (X 1,000) Following Admission Received Antibiotic Received Bacterial Culture Service
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
97
98.2
98.2
98.6
97.6
98.6
98
9
6
11
5
12
7
9
8
6
13
6
2
10
15
10
10
5
5
4
5
11
13
3
6
6
No
No
No
No
No
Yes
Yes
No
No
No
No
No
Yes
Yes
No
No
Yes
No
Yes
No
No
Yes
No
No
No
No
Yes
No
No
No
No
Yes
No
No
Yes
Yes
No
No
Yes
Yes
No
No
No
No
No
No
No
No
No
No
Medical
Medical
Surgery
Surgery
Surgery
Surgery
Medical
Medical
Medical
Surgery
Medical
Surgery
Surgery
Surgery
Surgery
Surgery
Surgery
Surgery
Medical
Surgery
Surgery
Surgery
Medical
Surgery
Medical
Transcribed Image Text:Id 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | 23 24 25 Duration of Hospital Stay 5 10 6 11 5 14 30 11 17 3 9 3 8 8 5 5 7 4 3 7 9 11 11 9 4 Age 30 73 40 82 60 47 Female 56 25 Female 43 50 4 22 32 36 69 Sex 47 Female 59 Female Female 11 Male 19 67 Male 33 Female 41 Male 20 Female Female Male Male Male Female Male 22 Female Male Male Male Male Male Female 43 Female Male First Temperature Following Admission First WBC (X 1,000) Following Admission Received Antibiotic Received Bacterial Culture Service 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 97 98.2 98.2 98.6 97.6 98.6 98 9 6 11 5 12 7 9 8 6 13 6 2 10 15 10 10 5 5 4 5 11 13 3 6 6 No No No No No Yes Yes No No No No No Yes Yes No No Yes No Yes No No Yes No No No No Yes No No No No Yes No No Yes Yes No No Yes Yes No No No No No No No No No No Medical Medical Surgery Surgery Surgery Surgery Medical Medical Medical Surgery Medical Surgery Surgery Surgery Surgery Surgery Surgery Surgery Medical Surgery Surgery Surgery Medical Surgery Medical
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