central tendency and correlation coeeficent

50 %
50 %
Information about central tendency and correlation coeeficent

Published on March 3, 2014

Author: koppulachandra

Source: slideshare.net

QTBD 2013 UNIT-1 Measures of Central Tendency Definition:  Average is a measure which represents the huge volume of data into a single numerical value.  An average gives us an idea about the concentration of the values in the central part of the distribution.  Averages are the typical values around which the other distribution concentrates. Types of Measures 1) Arithmetic Mean (or) Average 2) Median 3) Mode 4) Geometric Mean 5) Harmonic Mean Characteristics of Measures of central tendency       It should be easy to understand and easy to calculate. It should be based on all items. It should be capable for further algebraic calculations. It should be rigidly defined. It should not affected by the extreme observations. It should not affected by the fluctuations of the sampling. Demerits of measures of Central Tendency        It can’t be determined by inspection method nor can’t locate by graphically. Arithmetic mean can’t be used for qualitative characteristics, which cannot be measured quantitatively. Ex. Honesty, Intelligence, beauty, etc. Arithmetic mean cannot be used for open ended class-intervals. Ex. below 90 and above 100. Arithmetic mean is affected by extreme values. Arithmetic mean leads to wrong conclusions if the details of the data from which it is computed are given. Arithmetic mean cannot be obtained if the single observation is missing or lost from the remaining values. Arithmetic mean is not suitable measure for extremely asymmetric distribution. Method to calculate Average 1) Direct method. 2) In-direct method (or) Deviation method. 3) Step Deviation method. 1) Direct method : K.V.RAMESH BABUM.SC.STATISATICS @ ASSISTANT PROFESSOR Page 1

QTBD 2013

Add a comment

Related presentations

Related pages

Central Tendency, Dispersion, Correlation and Regression ...

Business Statistic Central Tendency, Dispersion, Correlation and Regression Analysis Case study for MBA program CHUOP Theot Therith 12/29/2010
Read more

Measures of Central Tendency - balkinresearchmethods.com

Correlation coefficient The Mean ... What measures of central tendency look like Group Exercise Calculate the mean, median, and mode
Read more

Central tendency - Wikipedia, the free encyclopedia

In statistics, a central tendency (or, more commonly, a measure of central tendency) is a central or typical value for a probability distribution. It may ...
Read more

Descriptive Statistics - Research Connections

Descriptive Statistics. ... Measures of central tendency are the most basic and, ... The most common correlation coefficient is Pearson's r, ...
Read more

Lesson 1: Measures of Central Tendency, Dispersion and ...

... Measures of Central Tendency, ... interpret measures of central tendancy, ... Here are two examples of calculating a correlation coefficient:
Read more


Define a correlation coefficient Define effect size. LEARNING OBJECTIVES ... Indicates central tendency with ordinal, interval, and ratio scales Mode
Read more

Data Analysis - Measures of Central Tendency

Measures of Central Tendency . ... Pearson's Correlation Coefficient ; Further Reading Critical Appraisal. Example Frameworks ; Worked Example; Develop ...
Read more

Basic Statistics (Sanjay Sawasthi) - University of Texas ...

The mean is a particularly informative measure of the "central tendency" of ... but other correlation coefficients ... statistics and correlations for ...
Read more

14: Correlation

... dataStatPrimercorrelation.wpd) 14: Correlation Introdu ction ... Several bivariate correlation coefficients can be calculated simultaneously and ...
Read more