Chapter 3 sec 1

# Chapter 3 sec 1 - Chapter3 MAT150 SECTION1...

This preview shows pages 1–9. Sign up to view the full content.

Measures of Central Tendency Chapter 3 SECTION 1 1 MAT - 150 Mr. Kenneth Horwitz

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Introduction Traditional Statistics Average Variation Position 2
Statistic vs. Population statistic  is a characteristic or measure obtained  by using the data values from a sample . parameter  is a characteristic or measure  obtained by using all the data values for a specific  population . 3

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
What do I do about rounding? General Rounding Rule The basic rounding rule is that rounding should not be  done until the final answer is calculated.  Use of  parentheses on calculators or use of spreadsheets help  to avoid early rounding error. 4
Measures of Central Tendency Mean Median Mode Midrange Weighted Mean 5

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Measures of Central Tendency:  Mean The  mean  is the quotient of the sum of the values  and the total number of values.   (the average) The symbol     is used for sample mean. For a population, the Greek letter μ (mu) is used for  the mean. 6 1 2 3 N X X X X X N N μ + + + + = = L X 1 2 3 n X X X X X X n n + + + + = = L
Price of flights to Cancun The data represent a sample of flight prices in dollars  to Cancun this spring break.  Find the mean. 872, 432, 397, 427, 388, 782, 397 7 The mean cost for a flight to Cancun is \$527.90. 1 2 3 n X X X X X X n n + + + + = = L 872 432 397 427 388 782 397 3695 \$527.90 7 7 X + + + + + + = =

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
Ages of employees in a department are listed.  What  is the mean age? 34, 27, 50, 45, 41, 37, 24, 57, 40, 38, 62, 44, 39, 40
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 28

Chapter 3 sec 1 - Chapter3 MAT150 SECTION1...

This preview shows document pages 1 - 9. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online