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James G

Page history last edited by PBworks 16 years, 10 months ago

Percent

 A percent is a part of 100 and it can also be parts of 100. With a percent you can convert it to either a dicimal, ratio, or a fraction.

 

 

 -Percent to Decimal-

 

  1. To get your decimal you take your percent and divide it by 100.

 

Example:

 

90% / 100= 0.9

 

 

-Percent to Ratio-

 

  1. To get your ratio, subtract 100 from a percent and the answer becomes the first part of your ratio.
  2. The percent that is left becomes your second part of your ratio.

 

Example:

100-45=55   

55 is the first part and 45 is your second.

 

55:45

 

 

-Percent to a Fraction-

 

  1. To get the fraction is simple. Just take the percent you have and put it as a numerator and 100 is your denominator.
  2. Simplify the fraction.

 

Example

 

60/100= 6/10

 

 

 

 

 

 

 Data Management and Graphing

   To do data management and graphing there are three things that you should know. The mean, median and mode. In this topic a set of data will be used.

 

 

-Finding the Mean-

The mean is the answer when you add up all the numbers in a set of data and divide it by the amount of numbers in the the set of data.

 

    1.To find the mean you would first add all the numbers in the set of data.

    2.WIth the answer that you've got, you divide it by the amount of numbers there are in the set if data.

    3.Your answer is the mean.

 

Example

 

1,2,3,4,5,6,7-Set of data

 

1+2+3+4+5+6+7=28

 

28/7=4

 

4 is your mean.

 

 

-Finding the Median-

 

The median is the middle number in a set of data in numerical order. There can also be two medians or middle numbers.

 

1,2,3,4,5,6,7

 

In this set of data there is only one median, but if there were two medians you would do something like this...

 

1,2,3,4,5,6,7,8

 

4 and 5 both appear to be a median. 

 

  1. Add both medians. 
  2. With the answer you divide it by 2.

 

4+5=9    9/2=4.5

 

4.5 is the median.

 

 

-Finding the Mode-

 

The mode is the number that shows up the most in a set of data. There can also be more than one mode or no mode.

 

Example

 

1,2,3,3,4,5,6,7

Here there is one mode which is the number three.

 

1,2,3,4,5,6,7

In this set of data there is no mode since no number shows up the most.

 

 

 

 

 

 

Comments (1)

Anonymous said

at 12:45 pm on May 27, 2007

Good Job James. I am glad you did this project. Part one is almost done. Add some pictures if youcan.

Harbeck

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