Standard Deviation -5. Range- difference between highest & lowest value in a set of data Standard Deviation- a widely used measurement of variability.

Slides:



Advertisements
Similar presentations
Ch 11 – Probability & Statistics
Advertisements

Chapter 13 Analyzing Quantitative data. LEVELS OF MEASUREMENT Nominal Measurement Ordinal Measurement Interval Measurement Ratio Measurement.
Chapter 14 Analyzing Quantitative Data. LEVELS OF MEASUREMENT Nominal Measurement Nominal Measurement Ordinal Measurement Ordinal Measurement Interval.
Variability Measures of spread of scores range: highest - lowest standard deviation: average difference from mean variance: average squared difference.
Ignore parts with eye-ball estimation & computational formula
As with averages, researchers need to transform data into a form conducive to interpretation, comparisons, and statistical analysis measures of dispersion.
Quantitative Data Analysis Definitions Examples of a data set Creating a data set Displaying and presenting data – frequency distributions Grouping and.
X = =2.67.
1 Chapter 4: Variability. 2 Variability The goal for variability is to obtain a measure of how spread out the scores are in a distribution. A measure.
Learning Objectives In this chapter you will learn about the importance of variation how to measure variation range variance standard deviation.
Chapter 5 – 1 Chapter 5: Measures of Variability The Importance of Measuring Variability The Range IQR (Inter-Quartile Range) Variance Standard Deviation.
Chapter 5 – 1 Chapter 5 Measures of Variability The importance of measuring variability IQV (index of qualitative variation) The range IQR (inter-quartile.
SHOWTIME! STATISTICAL TOOLS IN EVALUATION DESCRIPTIVE VALUES MEASURES OF VARIABILITY.
Grouped Data Calculation
 Deviation is a measure of difference for interval and ratio variables between the observed value and the mean.  The sign of deviation (positive or.
Central Tendency and Variability Chapter 4. Central Tendency >Mean: arithmetic average Add up all scores, divide by number of scores >Median: middle score.
Finding the Mean & the Standard Deviation. Finding the mean & Standard Deviation Find the Mean and the Standard Deviation of 6,5,5,4,5,5,6,5 and 4 We.
Quiz 2 Measures of central tendency Measures of variability.
Measures of Central Tendency Section 2.3. Central Values There are 4 values that are considered measures of the center. 1.Mean 2.Median 3.Mode 4.Midrange.
Statistics Recording the results from our studies.
BUS250 Seminar 4. Mean: the arithmetic average of a set of data or sum of the values divided by the number of values. Median: the middle value of a data.
Ch. 3 – part 1 Measures of central tendency Measures of variation Calculating standard deviation Using the TI30XII ma260notes_ch3_calc_directions.pptx.
Chapter 3 Basic Statistics Section 2.2: Measures of Variability.
Module 11: Standard Deviations and the Like This module describes measures of dispersion or unlikeness, including standard deviations, variances,
Describing Behavior Chapter 4. Data Analysis Two basic types  Descriptive Summarizes and describes the nature and properties of the data  Inferential.
Do Now. Chapter 5 Section E and F Vocabulary Relative frequency- frequency expressed as a fraction of the total frequency Cumulative frequency- sum of.
Descriptive Statistics1 LSSG Green Belt Training Descriptive Statistics.
Page 1 Chapter 3 Variability. Page 2 Central tendency tells us about the similarity between scores Variability tells us about the differences between.
Standard Deviation and Variance (Class 2) OBJ: Find range, measures of central tendency, and construct tables and graphs.
The table below shows the number of students who are varsity and junior varsity athletes. Find the probability that a student is a senior given that he.
DATA MANAGEMENT MBF3C Lesson #5: Measures of Spread.
Psychology’s Statistics. Statistics Are a means to make data more meaningful Provide a method of organizing information so that it can be understood.
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 and parameters. To find out about a population we take a sample.
Research Methods. Measures of Central Tendency You will be familiar with measures of central tendency- averages. Mean Median Mode.
Foundations of Math I: Unit 3 - Statistics
Statistics for Psychology!
STATISTICAL ANALYSIS Created by The North Carolina School of Science and Math.The North Carolina School of Science and Math Copyright North Carolina.
Chapter 3: Averages and Variation Section 2: Measures of Dispersion.
Statistics Describing, Exploring and Comparing Data
Chapter 4 Variability. Introduction Purpose of measures of variability Consider what we know if we know that the mean test score was 75 Single score to.
ECONOMICS SS2.
Ch. 3 – part 1 Measures of central tendency Measures of variation Calculation standard deviation Using the TI30XII.
Lesson 25 Finding measures of central tendency and dispersion.
Using Standard Deviation in AP Biology. Why would we use the standard deviation to analyze our lab result? In statistics and probability theory, standard.
Ch. 12 – part 1B Measures of central tendency Measures of variation Shapes of distributions Calculation standard deviation Using the TI30XII.
By Tatre Jantarakolica1 Fundamental Statistics and Economics for Evaluating Survey Data of Price Indices.
Data Analysis. Statistics - a powerful tool for analyzing data 1. Descriptive Statistics - provide an overview of the attributes of a data set. These.
Measures of Central Tendency, Variance and Percentage.
Chapter 4: Measures of Variability
Measures of Central Tendency
Using the Graphing Calculator to Find Area Under a Curve
Variance and Standard Deviation
Do Now: Find the mean, median, mode, and range of the data.
Warm Up What is the mean, median, mode and outlier of the following data: 16, 19, 21, 18, 18, 54, 20, 22, 23, 17 Mean: 22.8 Median: 19.5 Mode: 18 Outlier:
Module 6: Descriptive Statistics
Standard Deviation.
12.3 Analyzing Data 12.4 Standard Deviation.
Notes Over 7.7 Finding Measures of Central Tendency
Chapter 3.
Normal Distribution.
Psychology Statistics
Section 2.5 notes Measures of Variation
A graphing calculator is required for some problems or parts of problems 2000.
10.2 Variance Math Models.
Notes – Standard Deviation, Variance, and MAD
Statistics Screens for TI Graphing Calculators
The data sets {19, 20, 21} and {0, 20, 40} have the same mean and median, but the sets are very different. The way that data are spread out from the mean.
Statistics Standard: S-ID
Lecture 4 Psyc 300A.
Presentation transcript:

Standard Deviation -5

Range- difference between highest & lowest value in a set of data Standard Deviation- a widely used measurement of variability or diversity in statistics Variation- a measure of change in data

DO NOT WRITE Standard Deviation Variance

Graphing Calculator Enter lists of data just like central tendencies To calculate mean, variance, and standard deviation: STAT->-CALC-1 VAR STATS-ENTER-2 ND – STAT-NAMES 1-ENTER-ENTER

WHAT TO LOOK FOR Without clearing the calculator, enter the ENTIRE This will give you the variance.

Find the mean, standard deviation, and variance. {5.6, 5.6, 5.7, 5.8, 5.8, 5.8, 5.9, 6.1} Range= Mean( )=

Assignment

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com. Inc. All rights reserved.