Exercise 1: Suppose a hospital tested the age and body fat data for 18 randomly selected adults with the following result 23 23 27 27 39 41 47 49 50 age %fat 25.9 27.4 | 27.2 | 31.2 9.5 26.5 7.8 17.8 31.4 52 54 54 56 57 58 58 60 61 age %fat 34.6 42.5 28.8 | 33.4 30.2 | 34.1 | 32.9 | 41.2 | 35.7 (a) Normalize the two variables based on z-score normalization. (b) Calculate the correlation coefficient (Pearson's product moment coefficient). Are these two variables positively or negatively correlated?

Exercise 1: Suppose a hospital tested the age and body fat data for 18 randomly selected adults with the following result 23 23 27 27 39 41 47 49 50 age %fat 25.9 27.4 | 27.2 | 31.2 9.5 26.5 7.8 17.8 31.4 52 54 54 56 57 58 58 60 61 age %fat 34.6 42.5 28.8 | 33.4 30.2 | 34.1 | 32.9 | 41.2 | 35.7 (a) Normalize the two variables based on z-score normalization. (b) Calculate the correlation coefficient (Pearson's product moment coefficient). Are these two variables positively or negatively correlated?

Name: DATA MINING Exercise 1: Suppose a hospital tested the age and body fat
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Description: DATA MINING Exercise 1: Suppose a hospital tested the age and body fat data for 18 randomly selected adults withthe following result232327273941474950age%fat27.4 27.2 31.29.526.57.817.831.425.9525454565758586061age%fat | 34.642.5 28.833.430.234.132.9

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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Concept explainers

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.

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DATA MINING

Exercise 1: Suppose a hospital tested the age and body fat data for 18 randomly selected adults with
the following result
23
23
27
27
39
41
47
49
50
age
%fat
27.4 27.2 31.2
9.5
26.5
7.8
17.8
31.4
25.9
52
54
54
56
57
58
58
60
61
age
%fat | 34.6
42.5 28.8
33.4
30.2
34.1
32.9
41.2 35.7
(a) Normalize the two variables based on z-score normalization.
(b) Calculate the correlation coefficient (Pearson's product moment coefficient). Are these two
variables positively or negatively correlated?

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