ME 17, APPLIED NUMERICAL METHODS
SOLUTION
HOMEWORK 5
TA: GAURAV SONI
Problem1:
Part A:
The data set for this problem represents final scores of ME151C class from Spring 2008.
The matlab code is attached for finding the mean, the median and the standard deviation.
Following are the answers:
Mean = 75.2994
Median = 76.0566
Standard Deviation = 8.0199
Part B:
The mean score was subtracted from the data. The histograms of this data were created
using different numbers of bin. Following figures show these histograms. When number
of bins is only 2, the histogram does not reveal much information about the shape of the
data distribution. For higher number of bin (5 and 10), the histogram shows a smooth
shape of the distribution. For very high number of bins (i.e. 20), the discreteness of the
data is revealed. In other words, some of the bins remain completely empty.
Histogram with 2 bins
-25
-20
-15
-10
-5
0
5
10
15
20
0
10
20
30
40
50
60
70
xd
frequency

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Histogram with 5 bins
-25
-20
-15
-10
-5
0
5
10
15
20
0
5
10
15
20
25
30
35
40
xd
frequency
Histogram with 10 bins
-25
-20
-15
-10
-5
0
5
10
15
20
0
2
4
6
8
10
12
14
16
18
20
xd
frequency