Identify the following graphs. Practice Using Clickers.

Identify the following graphs

Practice Using Clickers

1. How are you doing today?

A. Fantastic!B. Pretty goodC. Tired

D. Not so good

2. It’s Friday, I am…

A. Not excited at allB. Sort of excitedC. ExcitedD. Really Excited!!E. … it’s Friday?

Organizing and Presenting DataReview

1. Which type of graph would you use to predict the world’s population growth in the future?

A. Bar graphB. PictographC. Line graphD. Scatter plotE. Stem –and –leaf plotF. Circle graph

2. Which type of graph would you use to look for a relationship between the number of hours your classmates watch television and the number of hours they play sports each month?

A. Bar graphB. PictographC. Line graphD. Scatter plotE. Stem –and –leaf plotF. Circle graph

3. What type of graph would you use to order NBA basketball players by height?

A. Bar graphB. PictographC. Line graphD. Scatter plotE. Stem –and –leaf plotF. Circle graph

4. Which type of graph would you use to show the relationship between speed and gasoline consumed?

A. Bar graphB. PictographC. Line graphD. Scatter plotE. Stem –and –leaf plotF. Circle graph

5. Which type of graph would you use in order to compare the percent of Canada’s population with each blood type?

A. Bar graphB. PictographC. Line graphD. Scatter plotE. Stem –and –leaf plotF. Circle graph

3.2 Exploring Sample Size

•Census – a survey of all the people in a population.

•Sample – a part of a population that is used to make predictions about the whole population

•Representative Sample – a sample from a population such that the properties of the sample reasonably reflect the properties of the population

1. If you wanted to determine what the favourite colour of the students in your class is, would you use a…

A. CensusB. Sample

Lets see…

What is your favourite colour within the list below?

A. RedB. YellowC. BlueD. PinkE. GreenF. Purple

2. If you wanted to know what the preferred vacation destination of families living in Ontario is, would you take a …

A. CensusB. Sample

3. If you wanted to know whether or not your community needed a new arena, would you take a…

A. CensusB. Sample

Exploring Sample Size

For a fund raiser for your school, you decided to sell milkshakes at the school’s Fun Fair. Before buying the ingredients, you wanted to know flavour preferences (Chocolate, Strawberry, or Vanilla). Instead of taking a census, you decide to use a sample from your class to represent the people who will attend the Fun Fair.

What sample size should you use?

What is your preferred milkshake?

A. ChocolateB. StrawberryC. Vanilla

Questions:

•Which sample size gave us the best prediction?

•Would our class be a representative sample of our school?

•Suppose that you wanted to know the cartoon-watching habits of students. You decide to use a sample from a class at a high school. Is this a representative sample of your school?

One Final Question:

Why is a large sample likely to be a better predictor of a population’s preferences than a small sample?

Please submit to Ms. King when you are finished (and before you leave)

Class Survey

1. What is your gender?

A. MaleB. Female

2. How many hours a week do you spend on the internet?

A. 0-10B. 10-20C. 20-30D. 30-40E. 40-50F. 50-60

3. How many text messages do you send in a day?

A. 0 -5B. 5-10C. 10-15D. 15 -20E. 20-25F. 25-30

4. How many hours a night do you spend watching TV?

A. 0B. 1C. 2D. 3E. 4F. >4

5. How many hours a week do you spend on extracurricular activities?

A. 0-2B. 2-4C. 4-6D. 6-8E. 8-10F. 10-12