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 Age 30 73 40 Male 47 Female Female 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 25 82 60 43 50 59 4 56 Female 20 32 69 47 Sex 22 Female 22 Female 33 Female 11 Female 19 Male 67 Male Female Male Female 36 Male Male Female Male Male Male Male Male Male Female 43 Female 41 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 7 4 13 3 10 5 7 6 8 13 8 2 12 13 10 8 5 7 6 7 9 13 5 4 4 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

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 Age 30 73 40 Male 47 Female Female 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 25 82 60 43 50 59 4 56 Female 20 32 69 47 Sex 22 Female 22 Female 33 Female 11 Female 19 Male 67 Male Female Male Female 36 Male Male Female Male Male Male Male Male Male Female 43 Female 41 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 7 4 13 3 10 5 7 6 8 13 8 2 12 13 10 8 5 7 6 7 9 13 5 4 4 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

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

PARTS E F G

(e) What is the best point estimate of the percentage of males among patients discharged from Pennsylvania hospitals?
%
(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.)
%
(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.)
%

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
20
32
36
69
47
Sex First Temperature Following Admission First WBC (X 1,000) Following Admission Received Antibiotic Received Bacterial Culture Service
59 Female
22
Female
11
Female
19
Male
22 Female
33 Female
Female
41
Male
Male
Female
Female
Male
Male
Male
Male
Male
Male
Male
Male
Male
67 Female
43 Female
Male
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
7
4
13
3
10
5
7
6
8
13
8
2
12
13
10
8
5
7
6
7
9
13
5
4
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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Follow-up Question

part F incorrect

(e) What is the best point estimate of the percentage of males among patients discharged from Pennsylvania hospitals?
52
✔%
(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.)
0.0999
|×|0
You may have
reversed the order of
division.
(g) Provide a 95% CI for
(32.42,71.58) %
among patients discharged from Pennsylvania hospitals. (Enter your answer using interval notation. Round your numerical values to two decimal places.)

Solution

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you are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bar-S herd. How much should a healthy calf weigh? Let x be the age of the calf (in weeks), and let y be the weight of the calf (in kilograms). x 3 4 9 16 26 36 y 43 46 79 100 150 200 Complete parts (a) through (e), given Σx = 94, Σy = 618, Σx2 = 2334, Σy2 = 82,706, Σxy = 13,724, and r ≈ 0.998. (a) Draw a scatter diagram displaying the data.(b) Verify the given sums Σx, Σy, Σx2, Σy2, Σxy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) Σx = Σy = Σx2 = Σy2 = Σxy = r = (c) Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) X Y Y_____ + ______x (d) Graph the least-squares line. Be sure to plot the point (x, y) as…
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The amount of time adults spend watching television is closely monitored by firms because this helps to determine advertising pricing for commercials. Complete parts (a) through (d). (a) Do you think the variable "weekly time spent watching television" would be normally distributed? If not, what shape would you expect the variable to have? OA. The variable "weekly time spent watching television" is likely normally distributed. OB. The variable "weekly time spent watching television" is likely symmetric, but not normally distributed. OC. The variable "weekly time spent watching television" is likely uniform, not normally distributed. O D. The variable "weekly time spent watching television" is likely skewed left, not normally distributed. O E. The variable "weekly time spent watching television" is likely skewed right, not normally distributed. (b) According to a certain survey, adults spend 2.25 hours per day watching television on a weekday. Assume that the standard deviation for…
You are the foreman of the Bar-S cattle ranch in Colorado. A neighboring ranch has calves for sale, and you are going to buy some calves to add to the Bar-S herd. How much should a healthy calf weigh? Let x be the age of the calf (in weeks), and let y be the weight of the calf (in kilograms). x 3 4 12 16 26 36 y 37 46 77 100 150 200 Complete parts (a) through (e), given Σx = 97, Σy = 610, Σx2 = 2397, Σy2 = 81,914, Σxy = 13,919, and r ≈ 0.999. (b) Verify the given sums Σx, Σy, Σx2, Σy2, Σxy, and the value of the sample correlation coefficient r. (Round your value for r to three decimal places.) Σx = ? Σy = ? Σx2 = ? Σy2 = ? Σxy = ? r = ? (c) Find x, and y. Then find the equation of the least-squares line = a + bx. (Round your answers for x and y to two decimal places. Round your answers for a and b to three decimal places.) x =? y =? y =?+?x (e) Find the value of the coefficient of determination r2. What percentage of the variation in y can be…
Answer D E F