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= = =1. Mean, Median, and Mode.= How do you calculate them:


 * Mean:** add the numbers to get the sum of all data. Then divide the sum of all data by the number of numbers in the data set. Mean is also the average.

ex. 1, 2, 3, 4, 5 1 + 2 + 3 + 4 + 5 = 15 / 5 (equals) 3 3 is your mean

sum of all data / number of numbers in data set = mean


 * Median:** The middle number of the set of numbers given. If the set of numbers are an even number, you take the two middle numbers and add them. Then you divide the sum by 2 and there's your median. MUST BE IN NUMERICAL ORDER.

ex. 2, 3, 1, 4, 5, 6 numerical order = 1, 2, 3, 4, 5, 6 since it is an even amount of numbers in the data set. You take the two middle numbers, which is 3 and 4. Add them - 3 + 4 (equals) 7/2 ? + ? = sum / 2 (equals) median 3.5 is your median


 * Mode:** The most common number in the data set. Put in numerical order to make it easier.

ex. 1, 2, 5, 3, 2, 2, numerical order - 1, 2, 2, 2, 4, 5 2 is the most common number. There are 3 2's. 2 is your mode

Find the **mean, median and mode** in the set of number. 7, 4, 5, 8, 7, 10, 1

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=2. Square Roots= Perfect Square: a whole number that can be multiplied by itself. No decimals. ex. 5 x 5 = 25 4 x 4 = 16

Square Root: The product of a number that is multiplied by itself What is the square root of 45? 817jmanswers

=3. Percent= 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. 817jmanswers

=4. Ratio Proportion Question 1= 1 solved with fraction 1 solved with ratio table a) Jacob has a record of winning 2 boxing matches for every 4 he loses, If he had 32 matches during the last year, how many did he win?

817jmanswers

=5. Ratio Proportion Question 2= b) A child can run 10 blocks in 5 minutes. How long does it take the child to run 7 blocks, at the same speed. 817jmanswers

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