841James+G

__**Mean, Median, Mode**__

Data: 17, 9, 8, 6 17+9+8+6=40 40/4=10 10 is the mean.
 * __Mean:__** The mean is the number you get when you have a set of data and add them all up. With the answer that you come up with, you divide it by the amount of data.
 * Example**

__**Median:**__ The median is the middle number in a set of data. The numbers must be in numerical order. Data: 6, 4, 8, 5, 7 Numerical Order: 4 5 __**6**__ 7 8 The number 6 is the middle number or the median.
 * Example**

It is also possible to have two medians, so if you do, you have to find the mean which would be your median. Data: 12, 8, 11, 10, 5, 6, Numerical Order: 5, 6, **8**, **10**, 11, 12 Since 8 and 10 are the median you need to do what is shown below. 8+10=18 18/2=**__8__** 8 is the median.
 * Example**

Data: 1, 6, 6, 4 The number 6 is the mode because it is the number that shows up the most.
 * __Mode:__** To get the mode you look for the number that shows up the most.
 * Example**

More than two modes can be in a set of data.
 * Example**
 * 6**, **6**, 7, **8**, **8** Here it shown that 6 and 8 are two modes in this set of data.

There can also be no mode. 2, 5, 6, 7, 10 Since no numbers appear more than onece there is no mode.
 * Example**

6, 4, 5, 8, 9,
 * __Questions:__**
 * 1) Find the mean, median and mode for the question below:

JG Answers

__**Square Roots

Perfect Square:**__ A shape with four equal sides, is a whole number and a whole square root. 6x6=36 36 is a perfect square because the square root of 6x6=36
 * Example**

__**Square Root:**__ A square root is a number you multiply by itself. 3x3=9 3 is the square root of 9 because 3x3=9.
 * Example**


 * __Finding the square root of a number without a calculator:__** If you want to find the square root without using a calculator you need to find the two nearest perfect squares. One of the nearest prefect squares has to be less than the given number and the other has to be greater than the given number.

Find the square root of 35.
 * Example**

1. Find the nearest perfect square. First, the perfect square less than 35.
 * 25** 25 because 5x5=25

2. Now find the perfect square that is greater than 35.
 * 36** 36 because 6x6=36

3. Next subtract the answer in number 2 from the answer in number 1. 36-25=**11** Number 11 is your denominator

4. To find your numerator you subtract the previous perfect square from the number that you have to find the square root for. 35-25=**10** Number 10 is your numerator.

5. Your whole number would be the square root of the perfect square. That would be **5** beacause 5x5=25 and 5 is the square root of the previous perfect square.

6. Your answer would be for the square root of 35 is 5 11/10


 * __Questions:__**

What is the square root for the following questions?

1) 95

2) 29

3) 8

4) 44

JG Answers

Is taking 15% off a given item and then an additional 10% off the reduced price the same as taking 25% off the original price? Why or why not?
 * __Percent__**