PPT-Averages or measures of central tendency

The inherent inability of the human mind to grasp in its entirety a large body of data which compel us to seek relatively few constants that will adequately describe the data The large number of big figures are not only confusing to mind but also difficult to . Mean Arithmetic Mean To calculate the arithmetic mean of a set of data we must 64257rst add up sum all of the data values and then divide the result by the number of values Since is the symbol used to indicate that values are to be summed see Sigm Frequencies, . Central Tendency, Dispersion and Standard Deviation. SIT094. The Collection and Analysis of Quantitative Data. Week 3. Luke Sloan. About Me. Name: Dr Luke Sloan. Office: 0.56 . Glamorgan. 1 1. 2. Comparing measures of forecast error between models 3. Simple exponential smoothing 4. Linear exponential smoothing 5. A real example: h ousing starts revisited Out - of - sample validation 1 Dakota Davis. Slides taken from a . Workshop presented by Linda Henkel and Laura . McSweeney. of Fairfield University. Funded by the Core Integration Initiative and the Center for Academic Excellence at Fairfield University. . Importance of central . tendency------. 1-- It is Representative score of group. 2-- Indirect description of the population. 3-- Comparison of performance of two group. . Type of . The Aim. The main purpose of Measures of Central Tendency is to provide a single summary figure that best describes the central location of an entire distribution. . A measure of Central Tendency also helps to simplify comparison of two or more groups tested under different conditions. Measures of Central Tendency. DEF: Those measurements that indicate the central values of a data set (the averages). How many are there?. 3. What are they called?. Mean – Median - Mode. Definitions of the three measures of central tendency. Scissors. Glue. A sharpened pencil. A calculator (mine or yours) – You’re welcome…. A worksheet from the table. Your Interactive Notebook. Make sure you’ve turned in yellow sheet from yesterday. IS YOUR NAME ON IT???. Displaying Data. Question 1a. What does 30 represent on the box plot? . Question 1b. What does 78 represent on the box plot? . Question 1c. What does 105 represent on the box plot? . Question 2a. What is the interquartile range of this box plot? . Variability. Di . Fara. Gino’s. Di . Fara. 1. 2. 4. 3. 4. 4. 3. 4. 1. 3. 3. 2. 5. 3. 2. Gino’s. 2. 3. 2. 3. 2. 2. 4. 4. 4. 3. 2. 4. 3. 2. 4. Σ 44 Σ 44. /15 . /. 15. Sometimes it is referred to as a “middle” number of the data.. Measures of Central Tendency:. A single number to serve as a representative value around which all the numbers in the set tend to cluster.. by. Dr. Deepali . nigam. Assistant Professor. Department of Physical Education, . Mahila. . Mahavidyalaya. (P. G.) . Kidwai Nagar, Kanpur. Measures of Central Tendency. Measures of central tendency are a combination of two words . Sometimes it is convenient to have one number that describes a set of data. This number is called a measure of central tendency, because it represents the center or middle of the data. The most commonly used measures of central tendency are the . 1. Introduction.. 2. Central tendency: mode, median, arithmetic mean and other measures. Definitions, calculations,. characteristics and criteria of use.. 3. Variability: Range, Variance, Standard Deviation (sample and population) and other measures.