How To Find The Mean

Mean - A measure of a central tendency

- The sum (adding) of a set of values divided by the number of values in the set.

Try This

i took this video from joshua..

http://www.mathsisfun.com/mean.html

Homework:

Textbook pages 431-433 # 1-16

Notes

Notes


Mean-a measure of central tendency


-the sum (adding) of a set of values

divided by the number of values in

Homework Pg.431-433 #1-16

Homework and Extra Practice.

Your homework for the weekend is pages 426 - 427 numbers 1 - 17 plus the math link.

Try some of these problems for extra practice:

Working With Data
1. List all the four-digit numbers that are even, have a 6 in the tens place, and whose digits add to 12.




2. Is 349 ´ 0.9 greater than, less than, or equal to 349? How do you know?
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3. Suppose you know that 48 ÷ 16 = 3. Without finding the exact answer, tell whether the answer to 48 ÷ 15.99 is greater than, less than, or equal to 3. Why?
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4. Use the multiplication below to answer the questions that follow.



a) Can E be 2? Explain.
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b) What is the value of D? Why?
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c) What is the value of G? How do you know?
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Measures of Central Tendency

Tests out of 10

8, 9. 4, 5, 9 set of data
4, 5, 8, 9, 9 re order from least to greatest

Dude says 8 is the best representative of the test scores because 8 is in the middle
Chick says 9 is the best rep because it shows up the most

Measure of Central Tendency - is the value that represents the centre of a set of data. You can find the mean, median, or mode

Median - the middle number in a set of data after the data has been arranged or ordered

eg. 2, 5, 6, 8, 9 median is 6
eg. 1, 3, 6, 8, 9, 10 median is 7
\ \
add together then divide by 2

Mode - the most frequently occuring number in a set of data

eg. 3, 5, 7, 7, 9 mode is 7
eg. 2, 2, 4, 6, 6, 8, 11 mode is 2 and 6
eg. 1, 2, 3, 4 mode is none
eg. 1, 2, 2, 2, 3, 3, 4, 4 mode is 2

Montreal scored the following goals in their last 10 games
5, 4, 3, 2, 1, 5, 3, 3, 7, 3

Find Mode and Median

Find the Mode and Median of each set of values

a) 4, 2, 6, 9, 4
b) 11, 5, 8, 11, 10
c) 4, 5, 8, 5, 5, 8, 5, 7
d) 14, 6, 14, 8, 10, 6, 10

Find Mode and Median:

H.W.

Find Mode and Median:

If you need help click this link

If you still need help watch this video:

http://www.youtube.com/watch?v=81zcjULlh58

Mr. Isfeld's best friend is your guest teacher tomorrow. Make sure you are the best class in the world !

Math & Homework

This diagram shows that a cabin with 1 room has 2 doors, a cabin with 2 rooms has 5 doors, and a cabin with 3 rooms has 8 doors.

y = 4x + 2 Create a real life pattern.

Solve for x when y = 100

If you need help click this link

H.W.

a) 10 = x + 6

b) x + 6 = 8

c) x - 2 = 9

d) x - 4 = 5

e) 2x + 1 = 7

f) 4x - 2 = 12

g) x divided by 4 + 3 = 9

h) x divided by 6 - 5 = 1

Homework

Chapter Review Pg.414-415
Practice test Pg.416-417

Algebra and Probability Review

What is the probability of rolling a 6 with one die and landing a coin on heads? Show a tree diagram to explain your answer.

Solving one step algebra equations

Apply the opposite operation

The 3 steps for solving one step algebra equations:

1st- Isolate the variable

2nd- Apply opposite operation

3rd- Check your work

Textbook Work : Page 405 - 407

Questions: # 1 - 21

Sorry for the big gap in the end, something went wrong when I put my pictures in.