Notes for June 06, 2011

Measure of Central Tendency- a value that represents the centre of a data set.

- can be the mean, medi

an and mode.

Data set- is a group of numbers that you mus

t arrange in order from least to greatest.

e.i 2,4,3,5,3,4,5,5,6,4,5,3,7,34,5,6

arrange from least to greatest: 2,3,3,3,4,4,4,5,5,5,5,5,6,6,7,34

Note: Before you find the Median, Me

an or Mode be sure that you arranged it from least to greatest.

Median- the middle number in a set of data after the data have been arranged in order.

If you left with two numbers you need to add them and divide them to get the median.

e.i

Mode- the most frequently occurring number in a set of data.

- mode and most have both 4 letters.

e.i

mode of 3,5,7,7,9 is 7 because 7 appeare

d the most.

mode of 1,1,1,2,2,2,3,3,3,4 is 1,2 and 3 because they appeared the most.

mode of 1,1,1,2,2,2,3,3,3 is no mode b

ecause they`re all last or second place.

Mean- a measure of central tendency.

- the sum of a set of values divided by the number of values in a set.

Range- the positive differences between the largest and smallest values in a data set.

Outlier- a value that is much larger or smaller than the other data value.

- the data set may have more than 1 outlier or zero outlier.

e.i

1,67,68,64,65,100 are 1 and 100 because the rest of them starts with 6 except for 1 and 100.

Here`s our homework for those who did not write it.

Find mean, median, mode, range and outliers.

18,19,79,17,20,12

14,14,16,15,16

98,202,99,91,2,95,89,88,94

Here`s a link to help you practice for mean, median, mode, range and outliers.

I also found a video to help you understand all about our lesson.

I hope this little information help you! :D

Answer to Janessa's Probability Question

Question: What is the p(red) marble? Express your answer as Fraction, Ratio and Percent.

Answer(s)

Fraction: 1/6

Ratio: 1:6

Percent: 16.66%

Answer to Norien's Probability Question

Question: What is the probability of spinning a BLUE? Express your answer as Fraction, Ratio and Percent.

Answer(s)

Fraction: 3/12 or 1/4

Ratio: 3:12 or 1:4

Percent: 25%

Answer to Joshua's Probability Question

Question: What is the probability of spinning green on this spinner? Express your answer as Fraction, Ratio and Percent.

Answer(s)

Fraction: 2/8 or 1/4

Ratio: 2:8 or 1:4

Percent: 25%

Answer to Mary's Question

Question: What is the probability on spinning p(yellow) on my spinner? Express as Fraction, Ratio and Percent.

Answer(s)

Fraction: 2/8 or 1/4

Ratio: 2:8 or 1:4

Percent: 25%

Answer to Charry's Probability Question

Question: What is the probability of spinning GREEN. Express as Fraction, Ratio and Percent.

Answer(s)

Fraction: 4/8 or 1/2

Ratio: 4:8 or 1:2

Percent: 50%

Probability Question

What is the p( green or gold) stars? Express as Fraction, Ratio and Percent.

Notes For January 6, 2011

1. Out of 100 is also known as Percent.

2. A number over 1 is also known as Decimal.

3. A whole number over a whole number is also known as Fraction.

Convert the following fractions to decimals and percents. Show your work.

1. 1/2

2. 3/4

3. 2/5



4. 1/3


Convert the following decimals to percents and fractions in lowest terms.

1. 0.125

2. 0.6

Homework

Which percent is larger 50% of 196 or 25% of 396?

Sorry I don't have video or link to add.

Parallelogram

Parallelogram- a four sided figure with opposite sides parallel and equal in length.

Note: Arrow means that the lines are parallel. ( one arrow is not same as two arrow)

[-] means that the lines are equal. ( one [-] is not equal with [=] )

Base- a side of a dimentional figure

- common symbol is "b"

Height- the perpendicular distance from the base to the opposite side

- common symbol is "h"

There are other kinds of parallelogram:

First is "rectangle"

Second is "square"

"Area of a Parallelogram"

Formula:

base x height= area

b x h= area

For example:

Joey cut a shape of a parallelogram. The base is 6 cm and the height is 4 cm. What is the area of Joey's parallelogram?

Answer: The area of Joey's parallelogram is 24cm2.

Here is a website to help your learn more about parallelogram and how to find its area.

Here's a video to help you more:

I hope all this information help you understand more :) !

Order of Operations

The Language Of Math

B- stands for brackets ( )

E- stands for exponents a2

D- stands for division

M- stands for multiplication

A- stands for addition

S- stands for subtraction

Note: Division, Multiplication, Addition and Subtraction moves in order from left to right.

Questions:

1.) Annie has been asked to calculate 1.7 + 6÷2. She claims the answer is 3.85. Do you agree? Explain why or why not.

Answer: Annie is wrong because the right answer is 4.7 . Here is the solution:

2.) Put brackets in the following expression to get the largest value possible. What strategy did you use?

Answer: I used multiplication or division as my strategy. Here's how I did it.

3.) Zack wants to buy a ruler that cost 1.60 each, then he saw a book that cost 2.50 and he saw a package of pens that cost 1.25. He want to buy 1 book, 1 package of pens and 5 rulers, but he only has $ 8.00. Does he have enough money to buy all those things?

Answer: No. Zack doesn't have enough money to buy those things because 1 book, 1 package of pens and 5 rulers cost $ 11.75. Here is my solution:

Here's a website to help you learn B.E.D.M.A.S.

Here`s a video to help you more :)

I hope I help you! (:

Correction for Number 15

A(n) translation arrow shows distance and direction a figure has moved on a coordinate grid.



This is a example image of a Translation Arrow.

>

p>

You can also try this link to learn more about coordinates.

This is a video of how to translate a shape.

I hope it helps you.