5.1+Estimating+the+Size+of+a+Crowd+0910

//**__ Notes __**//// : Unit Rates= for 1 object // // If the rounding number is 5 or above round up, if it’s lower than 5 round down. // Avereage= data added up and then devided by the number of collections I think there are around 1386 people at the rally. I found this answer by dividing the main square into smaller squares. I divided it into 77different parts ( each 1 cm2). I then counted the people in around 5 squares which i then dived by 5( my answer was 18). I then took 18 and multiplied it by 77 which was 1386 people. I think a poor method would be counting badly or once per square. You should count at least twice to get a good number. Another bad method would be to judge or make an estimate from one sample. Basically making an average from less then 2 samples or not deviding the main square into equal parts would be bad techniques.
 * __ N.I. __**
 * __ 9/12/09 __**
 * __ Block:E __**
 * __ Big Idea __** : Many important practical and mathematical applications involve comparing quantities of one kind or another; it is important to know which method to use and how we should use them.
 * __ Essential Question __** : // What methods are there for comparing things? //
 * __Problem 5.1: Estimating the Size of a Crowd__**
 * __Question: Estimate how many people attended the rally. Explain the method you used to arrive at your answer.__**
 * __Problem 5.1 Follow Up:__**
 * __Question: In your group, discuss ways your method might lead you to a poor estimate of a crowd.__**