Measures of Central Tendency

Slides:

Advertisements

Similar presentations

T-5 Mean, Median and Mode. Definitions Mean: the average; add up the numbers in your list and divide by how many numbers you have Median: the middle value.

Advertisements

Central Tendency Mean – the average value of a data set. Add all the items in a data set then divide by the number of items in the data set.

Slide 1 © 2002 McGraw-Hill Australia, PPTs t/a Introductory Mathematics & Statistics for Business 4e by John S. Croucher 1 Measures of central tendency.

4.8:Mean, Median, Mode & Range

Measures of Central Tendency Jan Sands 2007 Mean, Median, Mode, Range.

Mean, Median, Mode and Range

Measures of Central Tendancy Lesson 6.05 Vocabulary Review Sum – the answer to an addition problem. Addend – the numbers you added together to get the.

Mean Median Mode Range by: courtney widmer. MEAN definition: the average of a set of data steps 1 add numbers 2 count numbers 3 divide the number of numbers.

Measures of Central Tendency

Measures Of Central Tendency “AVERAGES”. Measures Of Central Tendency In finding the single number that you felt best described the position at which.

MEASURES OF CENTRAL TENDENCY

Measures of Central Tendency Sixth Grade Mathematics

OBJ: E.Q.: YWBAT understand CENTRAL TENDENCIES like Mean, median, mode and range. How do we find the mean, the median, the mode, and the range of a given.

What is Central Tendency? Statistics analyzes and interprets large sets of numbers. To make the lists of data more comprehensible, central tendencies are.

Measures of Central Tendency Algebra 2. An average is a number that is representative group of data. There are three types of averages:  Mean- the sum.

Data Analysis: Measures of Central Tendency Objective: To find and interpret the mean, median, and mode of a set of data. Open books to page 711.

Thinking Mathematically

Vocabulary Measure of central tendency: one number that describes a set of data USEWHEN… The data are spread out and you want an average (add all and divide.

Statistics: Mean, Median, Mode and Range Year 8 Advanced Maths class Statistics Lesson 2.

Measures of Central Tendency Algebra A Unit 2, Lesson 1.

Mean: The AVERAGE values of a set of numbers. The mean is found by ADDING all of the values, then DIVIDING by the number of values in the set of data.

Math Skills in Science Scientific Inquiry #4. Vocabulary Mean Mean Median Median Mode Mode.

How to solve ? Mean & mode problems.

(7.12) Probability and statistics The student uses measures of central tendency and range to describe a set of data. The student is expected to: (A) describe.

Measures of Central Tendency Mean, Median, Mode, and Range.

Mean, Median, Mode, and Range. Mean is the average of a set of data. To calculate the mean, find the sum of the data and then divide by the number of.

DAY 2. Mean is the Average. How do you find the average ? Median = number in the middle. How do find the median? Mode is the number that shows up the.

The number which appears most often in a set of numbers. Example: in {6, 3, 9, 6, 6, 5, 9, 3} the Mode is 6 (it occurs most often). Mode : The middle number.

Notes 5.1 Measures of Central Tendency A measure of central tendency is a single number that is used to represent a set of data. Measures of central tendency.

Chapter II Methods for Describing Sets of Data Exercises.

Measures of Central Tendency Mean, Median, Mode, Range Standard VII-5.

Mean, Median, and Mode Lesson 7-1. Mean The mean of a set of data is the average. Add up all of the data. Divide the sum by the number of data items you.

Central Tendency Mean – the average value of a data set. Add all the items in a data set then divide by the number of items in the data set.

Measures of Central Tendency: Just an Average Topic in Statistics.

Measures of Central Tendency PS Algebra I. Objectives Given a set of data, be able to find the following: 1) mean* 2) median* 3) mode* 4) range 5) first.

definitions Data set: Data Value: Measure of Central Tendency: A group of related facts expressed as numbers. One of the entries of the data set. A single.

Measures of Central Tendency, Variance and Percentage.

Measures of Center Sigma- A symbol for sum. ∑ Summation Notation- The use of the sigma symbol to represent a summation. Also called sigma-notation or.

Chapter 4 – Statistics II

Mean, Median, Mode, and Range

Measures of Central Tendency

Measures of Central Tendency

Starter Questions.

, Mean Median , Range Mode &.

Measures of Central Tendency

Measures of Central Tendency & Center of Spread

Information used to create graphs and find statistics

Statistics A statistic: is any number that describes a characteristic of a sample’s scores on a measure. Examples are but not limited to average (arithmetic.

Central Tendency By: Mackenzie Puckett.

GSE Algebra I Unit 6A Describing DATA Day 1

Measures of Central Tendency & Range

Single Variable Data Analysis

Mean, Median, Mode, and Range

Central Tendency Central Tendency – measures of location for a distribution Mode – the commonly occurring number in a data set Median – the middle score.

14-2 Measures of Central Tendency

Stem & Leaf Plots How to make a Stem & Leaf Plot.

Mean: average 2. Median: middle number 3. Mode: most often

Decimal Applications : Mean, Median, and Mode

Measures of Central Tendency

Making Sense of Measures of Center Investigation 2

Mean, Median, Mode & Range

Find median-table data

Creating Data Sets Central Tendencies Median Mode Range.

Measures of Central Tendency

13.1 Central Tendencies Objective: Students will be able to identify the mean, median, and mode given a data set. They will also be able to identify what.

Grade 12 Essential Math Measurement and Statistics

Measures of Central Tendency for Ungrouped Data

Stem & Leaf Plots How to make a Stem & Leaf Plot.

Averages Handling Data.

Presentation transcript:

Measures of Central Tendency

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 Mean The value resulting from adding all the numbers up in a data set, and dividing by the number of values in the data set. Median The central number in a data set that has been placed in chronological order. A mean average of both central values is taken when the sample has an equal number of values. Mode The most common occurring number in a data set

Measures of Central Tendency How do you work out the mean? One adds up all the values in the data set and divides by the number of values What is the mean for this data set? 34 56 57 89 102 122 123 583/ 7 = 83.2

Measures of Central Tendency What is the median of this data set 14 15 16 16 16 17 17 18 19 20 22 The median is 16+17/2 = 16.5 What is the mode of this data set The mode is 16

Measures of Central Tendency Draw a grid and fill it in using the information below: Decide which are advantages and disadvantages of each measure of central tendency (see next slide for answers) Very large or very small numbers (anomalies) can distort the answer All the data are used in it’s calculation, making it a powerful measure It must be a number that appears in the data set Is not affected by very large or very small numbers Maybe more than one value, or no value exists. Does not use the actual mathematic data, only the position of the number in the series Advantages Disadvantages Mean Median Mode

Measures of Central Tendency Advantages Disadvantages Mean All the data are used in it’s calculation, making it a powerful measure Very large or very small numbers (anomalies) can distort the answer Median Is not affected by very large or very small number Does not use the actual mathematic data, only the position of the number in the series Mode It must be a number that appears in the data set Maybe more than one value, or no value exists.