Warm UpFind the x and y intercepts for

each equation

1. 2x – 3y = 12

2.

Monday, January 13th

53 xy

Week at a Glance

Monday: Skewing, Frequency & Box and Whisker Tuesday: Histograms and dot plots Wednesday: Quiz Thursday: Scatterplots day1 Friday: Scatter plots day 2

Warm Ups

10 points each day 1. Write down the question 2. Show work (if you can)

3. Correct answer

*Use your warm ups as a second study guide

Useful Tools

1. Website: mskristaevans.wordpress.com Daily PowerPoints Important upcoming dates Test information-study guide

answers

2. Remind 101To receive messages via text, text

@92e82 to (470) 238-2447.

EOCT Practice One question a

day We will have a

winner each week-reward will be

given

WARM UP – EOCT QUESTION 1 1.

FRIDAY’S ACTIVITY

Two-Way Frequency

Vs. Probability

Frequency-just the number

Probability-must divide out of some sort of total

Cameron surveys students in his school who play sports, and asks them which sport they prefer. He records the responses in the table below. What is the joint frequency of male students who prefer soccer?

1. Look for the row of “male” students.2. Look for the column with the response “soccer”.3. The joint frequency is the intersecting cell for males and soccer.

Gender Preferred SportBaseball Soccer Basketball

Male 49 52 16Female 23 64 33

Example 1:

Example 2 Abigail surveys students in different grades, and asks each student which pet they prefer. The responses are in the table below. What is the marginal frequency of each type of pet?

Grade Preferred PetBird Cat Dog Fish

9th 3 49 53 2210th 7 36 64 10Total        

1. Sum the responses for bird, cat, dog and fish and fill in the bottom row of the table.

2. These totals are the “marginal frequencies” for this data.

Example 3 Time Spent

Studying (hrs)

Test Score0-25 26-50 51-75 76-100

0-2 2 8 12 22-4 0 10 8 244-6 1 0 2 96+ 0 0 1 4What is the joint frequency of studying 0-2

hrs and scoring 51-75?

#4How many wrestlers won their home matches?

# 5How many wrestlers lost their away matches?

#6What is the percent of all matches to matches that were a draw?

#7 What is the conditional frequency of away matches that were a draw to all away matches ?

#8What percent of campers like swimming to the total number of campers surveyed?

Swimming No Swimming

Total

Canoeing 28 34 62No Canoeing

43 45 88

Total 71 79 150

PART I-Frequency Dot plots and Skewing

Helpful HintLook at the “tail”

Tail to the right=skewed right Tail to the left=skewed left

PART 2-How does an outlier effect the spread, center, and

box plot

Test Scores 80, 82, 85, 86, 92, 81, 79, 90

Create a box and whisker plot Be sure to label:

MinMax Q1

Median Q3

80, 82, 85, 86, 92, 81, 79, 90 Mr. Link comes and scores a 58 on the test. Create a new box plot.

1. How does the median change? 2. How does the skewing change? 3. How does your Measures SPREAD

change? 4. How does your measures of

CENTER change?