Chapter 3 sec 1

Chapter 3 sec 1 - MeasuresofCentralTendency Chapter3 MAT150...

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

View Full Document Right Arrow Icon
Measures of Central Tendency Chapter 3 SECTION 1 1 MAT - 150 Mr. Kenneth Horwitz
Background image of page 1

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

View Full DocumentRight Arrow Icon
Introduction Traditional Statistics Average Variation Position 2
Background image of page 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
Background image of page 3

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

View Full DocumentRight Arrow Icon
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
Background image of page 4
Measures of Central Tendency Mean Median Mode Midrange Weighted Mean 5
Background image of page 5

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

View Full DocumentRight Arrow Icon
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
Background image of page 6
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 + + + + + + = =
Background image of page 7

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

View Full DocumentRight Arrow Icon
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
Background image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/09/2011 for the course STATS 221 taught by Professor Nielson during the Fall '10 term at BYU.

Page1 / 28

Chapter 3 sec 1 - MeasuresofCentralTendency Chapter3 MAT150...

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

View Full Document Right Arrow Icon
Ask a homework question - tutors are online