### 1 Lesson 5 Measures of Central Tendencies

1 Lesson 5 Measures of Central Tendencies 1.1 Introduction We have outlined the correct process for dealing with data. The steps are 1. Organize the data. 2. Arrange the data. 3. Present the data. We have spent some time on step 3, but have concentrated on presenting the data graphically. In doing so, we have used found that it is often a good ...

November 20th,2019

### Measures of Central Tendency (Location) Sample Mean

Measures of Central Tendency (Location) Needed: An objective, concise summary of a data set. For many purposes, just two numbers will suffice: (1) A measure of central tendency (i.e., the typical value, or location), (2) A measure of dispersion (fluctuation). Here, we discuss measures of central tendency. The two most

November 20th,2019

### PRACTICE QUESTIONS FOR MEASURES OF CENTRAL TENDENCY ...

PRACTICE QUESTIONS FOR MEASURES OF CENTRAL TENDENCY Example (the arithmetic mean p248):-The demand for a product on each of 20 days was as follows, (in ... Set out the advantages and disadvantages of the mean, median and mode as measure of central tendency. {(i) THE MEAN The mean has the following advantages;

November 20th,2019

### 1 Lesson 5 Measures of Central Tendencies

1 Lesson 5 Measures of Central Tendencies 1.1 Introduction We have outlined the correct process for dealing with data. The steps are 1. Organize the data. 2. Arrange the data. 3. Present the data. We have spent some time on step 3, but have concentrated on presenting the data graphically. In doing so, we have used found that it is often a good ...

November 20th,2019

### Measures of Central Tendency: Mean, Median, and Mode Examples

Measures of Central Tendency: Mean, Median, and Mode Examples 1. Lesson Initiator – What is the purpose of finding an “average?” 2. In analyzing, statistical data, it is often useful to have numbers describe the complete set of data. “Measures of central tendency” are used because they represent centralized or middle values of the data.

November 20th,2019

### Chapter 8 Describing Data: Measures of Central Tendency ...

relatively small set of central tendency and dispersion measures from the two categories. Measures of Central Tendency The measures of central tendency describe a distribution in terms of its most “frequent”, “typi-cal” or “average” data value. But there are different ways of representing or expressing the idea of “typicality”.

November 20th,2019

### 4 Measures of Central Tendency

central tendency. Measures of central tendency offer informa-tion about where the bulk of the scores in a particular data set are located. A person who is computing a measure of central tendency is, in essence, asking, “Where is the middle?” Averages offer information about the normal or typical per - son, object, or place in a sample.

November 20th,2019

### Measures of Central Tendency & Variability

-Central Tendency + Variability = a more accurate picture of our data set.-The 3 main measures of variability: Range, Variance, and Standard Deviation. • These formulas are the root formulas for many of the statistical tests that will be covered later – t-test, ANOVA, and Correlation • Tell us how much observations in a data set vary (differ