Statistical Questions and Dot Plots

Statistical Questions and Dot Plots

Asynchronous Lesson: Take your own notes in your notebook.

Open Ended

What is a statistical question?

A statistical question....

• Requires you to gather data

• Is not a yes or no question

• One that can be answered by collecting multiple data and where there will be variability in that data.

Multiple Choice

A question that asks about a set of data is called a ________________________.

• attribute

• frequency

• statistical question

• data

Multiple Choice

Is the following question statistical or non statistical?
On average, how many water bottles does every class go through daily?

• Statistical
• Non Statistical

Multiple Choice

Is the following question statistical or non statistical?
How many cars are in the parking lot?

• Statsitical
• Non Statistical

Multiple Choice

Is the following question statistical or non statistical?

How many students in our school prefer chocolate chip over oatmeal raisin?

• Statistical

• Non Statistical

Multiple Choice

Is the following question statistical or non statistical?
How tall are the students in our class?

• Statistical
• Non Statistical

Dot Plots

Each dot represents one answer. In the sheet to the right, 3 students answered that they had 0 cookies at lunch. 5 said they had 2 cookies.

Multiple Choice

This is a

• dot plot

• frequency table

• relative frequency table

• histogram

Outlier

If there is a number far from the normal set, we call that the outlier.

1,10,12,15,16

Our outlier is 1

Multiple Choice

What is the outlier for this data?

• 90

• 96

• 102

• 108

Multiple Choice

How many students took the quiz? (count the dots)

• 15

• 20

• 12

• 17

Shape of a dot plot graph

Normal is like a camel hump or an upside down U.

Skewed Right

Think of it like a tail. The if the numbers decrease on the right side of a graph, the tail goes to the right, and the graph is skewed right.

Skewed Left

Our tail trails to the left, like a dinosaur. We say that these graphs are skewed left.

Multiple Choice

Are these dot plots symmetric?

• Yes
• No

Multiple Choice

Which statement correctly describes the shapes of the dot plots for cars and SUVs?

• SUVs: symmetrical
  Cars: skewed left
• Both are skewed left
• Both are symmetrical
• SUVs: skewed right
  Cars: Skewed left

Multiple Choice

Is the Cars dot plot skewed left or right?

• left
• right

Multiple Choice

How many students received a score of 94%? 

• 94
• 4
• 1
• 2

Multiple Choice

What is the outlier for this data?

• 90

• 96

• 102

• 108

Multiple Choice

What shape is the dot plot for SUV's?

• skewed right

• skewed left

• symmetrical

• none of the above

We can use the dot plot to find Mean, Median, and Mode

Remember, write out all your numbers in numerical order then solve the problem.

Multiple Choice

What is the median of the data?

• 2

• 1

• 3

• 12

Multiple Choice

What is the MEDIAN of this data?

• 65
• 40
• 915
• 13

Multiple Choice

What is the range of the test scores?

• 15
• 100
• 6
• 10

Multiple Choice

What is the MODE of this data?

• 90
• 85, 90, and 95
• 85 and 95
• None

Multiple Choice

What is the highest score in the class?

• 88%

• 100%

• 13

• 98%

Multiple Choice

What is the highest score in the class?

• 88%

• 100%

• 13

• 98%