After finding the mean, median, SD and CV, what can be concluded about the performance characteristics of the analysis? Table 1. Chemical Oxygen Demand (COD) (Chemische Sauerstoffbedarf or CSB in German) of three different Quality Control samples measured several times (mg/L)Ifd-NrQC Sample 200QC Sample 50OC Sample 25119350.0519.00219350.0519.00321057.5521.35420455.9020.30519247.659.9520551.5016.30720548.2015.1519953.1514.30920254.7520.101019545.3513.601119450.9011.001220150.5514.001320453.4512.601420453.6519.601529549.2016.301619548.6516.901719446.3015.101819647.2010.751920556.3022.952019545.1012.202120453.3520.852219847.6510.502319552.6517.902420253.0517.25

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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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After finding the mean, median, SD and CV, what can be concluded about the performance characteristics of the analysis?

Table 1. Chemical Oxygen Demand (COD) (Chemische Sauerstoffbedarf or CSB in German) of three different Quality Control samples measured several times (mg/L)
Ifd-Nr
QC Sample 200
QC Sample 50
OC Sample 25
1
193
50.05
19.00
2
193
50.05
19.00
3
210
57.55
21.35
4
204
55.90
20.30
5
192
47.65
9.95
205
51.50
16.30
7
205
48.20
15.15
199
53.15
14.30
9
202
54.75
20.10
10
195
45.35
13.60
11
194
50.90
11.00
12
201
50.55
14.00
13
204
53.45
12.60
14
204
53.65
19.60
15
295
49.20
16.30
16
195
48.65
16.90
17
194
46.30
15.10
18
196
47.20
10.75
19
205
56.30
22.95
20
195
45.10
12.20
21
204
53.35
20.85
22
198
47.65
10.50
23
195
52.65
17.90
24
202
53.05
17.25

Definition Definition Middle value of a data set. The median divides a data set into two halves, and it also called the 50th percentile. The median is much less affected by outliers and skewed data than the mean. If the number of elements in a dataset is odd, then the middlemost element of the data arranged in ascending or descending order is the median. If the number of elements in the dataset is even, the average of the two central elements of the arranged data is the median of the set. For example, if a dataset has five items—12, 13, 21, 27, 31—the median is the third item in ascending order, or 21. If a dataset has six items—12, 13, 21, 27, 31, 33—the median is the average of the third (21) and fourth (27) items. It is calculated as follows: (21 + 27) / 2 = 24.

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