PPT-Unit 6 Review Measures of Central Tendency, Measures of Variation

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 . 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 Mean, Median, Mode, . Range. Measures of Variation. Box . Plots. Line . Plots. Histograms. CCGPS Standards. MCC6.SP.1. . Recognize a statistical question as one that anticipates variability in the data related to the question and accounts for it in the answers. For example, “How old am I?” is not a statistical question, but “How old are the students in my school?” is a statistical question because one anticipates variability in students’ ages. . 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. News. Looking at Normal Distribution and Its Familiar Curve. Using Measures of Data Variation to Judge the Credibility of Statistics in the News. Just as you can use measures like the margin of error and standard deviation to gauge your confidence in the data that you’re reading, you can also use these metrics to measure your confidence in the articles or stories where the statistics are reported. . to . Evaluate the . Credibility of Statistics in the . News. Looking at Normal Distribution and Its Familiar Curve. Using Measures of Data Variation to Judge the Credibility of Statistics in the News. . Mean, Median, Mode. Measures of Variation. . Range, Variance and Standard Deviation. Measures of Association. . Covariance and Correlation. Describing Data: . Summary Measures. 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. 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 . 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 . 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 .