please give answers of b,c
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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please give answers of b,c
Transcribed Image Text:Q6. In a drug trial, 50 patients (samples) are divided into two groups (Group A and
Group B) to identify the clinical effect of a drug. The data for patients in Group A are
given in the following table:
Group A
Patient
Number
Family history of Average systolic
heart attack
Age
Sex
blood pressure
No
No
Yes
Female
122
1
2
32
42
Female
124
Male
Female
Male
Male
Male
156
31
63
3
4
No
99
Yes
Yes
No
No
138
48
30
109
57
89
8
46
Male
114
No
Male
Female
Male
Male
28
86
10
54
No
134
Yes
146
11
12
38
No
134
53
51
No
Female
Female
13
115
Yes
No
14
46
134
15
Female
132
60
63
16
Male
No
96
Male
Male
17
33
No
87
18
45
No
93
Yes
No
Yes
19
29
Female
152
121
Female
Male
34
20
21
44
112
22
47
Female
No
114
23
56
Male
No
119
No
Male
Female
24
48
97
25
29
Yes
120
a) Differentiate between qualitative and quantitative data with examples. Identity the
qualitative and quantitative data from the table.
b) Calculate the variance and standard deviation of Age for the 25 patients in Group
А.
c) Calculate the standard error and co-efficient of variation of Age for the 25 patients
in Group A.
d) For Group B, the mean age is 46 with a standard deviation of 5.3. Using the
answers from b and c compare the variations of age in Group A and Group B.
e) What are the limitations of standard deviation?
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