Subjects
Applied Mathematics for Electrical Engineering - 3130908
Complex Variables and Partial Differential Equations - 3130005
Engineering Graphics and Design - 3110013
Basic Electronics - 3110016
Mathematics-II - 3110015
Basic Civil Engineering - 3110004
Physics Group - II - 3110018
Basic Electrical Engineering - 3110005
Basic Mechanical Engineering - 3110006
Programming for Problem Solving - 3110003
Physics Group - I - 3110011
Mathematics-I - 3110014
English - 3110002
Environmental Science - 3110007
Software Engineering - 2160701
Data Structure - 2130702
Database Management Systems - 2130703
Operating System - 2140702
Advanced Java - 2160707
Compiler Design - 2170701
Data Mining And Business Intelligence - 2170715
Information And Network Security - 2170709
Mobile Computing And Wireless Communication - 2170710
Theory Of Computation - 2160704
Semester
Semester - 1
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Semester - 3
Semester - 4
Semester - 5
Semester - 6
Semester - 7
Semester - 8
Applied Mathematics for Electrical Engineering
(3130908)
AMEE-3130908
Winter-2019
Question-5a-OR
BE | Semester-
3
Winter-2019
|
26-11-2019
Q5) (a)
3 Marks
The pH solution is measured eight times using the same instrument and data obtained are as follows:
7
.
15
,
7
.
20
,
7
.
18
,
7
.
19
,
7
.
21
,
7
.
20
,
7
.
16
,
7
.
18
Calculate the mean, variance and standard deviation.
Mean
x
¯
=
∑
x
i
n
=
7
.
15
+
7
.
20
+
7
.
18
+
7
.
19
+
7
.
21
+
7
.
20
+
7
.
16
+
7
.
18
8
=
57
.
47
8
=
7
.
1838
Standard Deviation
x
x
-
x
¯
x
-
x
¯
2
7.15
-
0.0338
0.0011
7.20
0.0162
0.0003
7.18
-
0.0038
0.00001
7.19
0.0062
0.00004
7.21
0.0262
0.0007
7.20
0.0162
0.0003
7.16
-
0.0238
0.0006
7.18
-
0.0038
0.00001
∑
x
A
-
x
A
¯
2
=
6500
∑
x
A
-
x
A
¯
2
=
6500
∑
x
-
x
¯
2
=
0
.
0031
σ
σ
=
∑
x
-
x
¯
2
n
=
0
.
0031
8
=
0
.
0197
Variance
σ
σ
2
=
0
.
0197
2
=
0
.
0004
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