709-2011

Tuesday, June 12, 2012

the outlier!

outlier is a value that is much larger or smaller than the
other data value the data may have more than
one outlier or zero outlier.
example:
3,8,4,5,9,33,5,6
first we have to put them in order before we find the outlier
3,4,5, 5,6,8,9,33
the outlier is 33

the mean!

mean- a measure of central tendency
the sum of a set of values divided the numbers of
values in the set
mean- 6,4,8
add up all the numbers and divide the result by how many
numbers are there
6+4+8=18
18 divided by 3= 6
therefor the mean is 6

Exam Notes: Formulas for a Circle

There are 2 formulas to find the circumference of a circle. There is one formula to find the Area.
These are the formulas:

Circumference:
1.) C=πd (Circumference is equal to Pi times the diameter.)
2.) C=2πr (Circumference is equal to 2 times Pi times the radius.)

Area:
1.)

(Area is equal to pi times the radius squared)

E.g. Find the Circumference and the Area of a circle that has a radius of 5.

Circumference:
C=2πr
C=2x3.14x5
C=3.14x10
C=31.4

Area:
A=πrr
A=3.14x5x5
A=3.14x25
A=78.5

I hope you learned something.

Monday, June 11, 2012

Range And Outlier

Range- the positive difference between the largest & smallest values in a Data set.

example-

4 6 9 8 4 4 7 8

4 4 4 6 7 8 8 9

9-4= 5 ------ so the range is 5

You Don't Get Range? Then Click this!

Outlier- a value that is much longer or smaller than the other data values. The data set may have more than 1 outliers, or none at all.

example-

1 5 9 7 3 8 43

1 3 5 7 8 9 43 ----- the odd one out is 43, so the outlier is 43

You Don't Get Outlier? Then Click this!

You Still Don't get Both of them? Then check this video out!

To Test you...

Here's a Question....

Here's the answer!

If you got that correct then CONGRATS!! You know how to do range and outlier now... YOUR WELCOME :)