Categorical, Numerical Data - Dot plots, Median

6.SP1 LESSON: Categorical and Numerical Data

What is categorical data?

 A collection of data that can be put into categories or groups.  Such as.......

 Breeds of Dogs!

Genres of books!

What is numerical data

These data are expressed in number form, (NOT words or letters), such as......

Your height! (How tall you are.)

Time spent walking!

Multiple Choice

A. Heights of 20 Sixth Graders

• CATEGORICAL

• NUMERICAL

Multiple Choice

B. Favorite flavor of ice cream for 10 sixth graders

• CATEGORICAL

• NUMERICAL

Multiple Choice

C. Hours of sleep recorded by 30 sixth graders

• CATEGORICAL

• NUMERICAL

Multiple Choice

D. Eye color for 30 sixth graders

• CATEGORICAL

• NUMERICAL

DISPLAYING DATA: DOT PLOTS

• To answer statistical questions we collect data.

• Numerical data can be summarized using dot plots.

• Another name for a dot plot is line plot.

• Dot plots can be symmetrical (means both sides are identical).

• The number of dots in each column represents the number of data points for each value.

• You can easily find the median (the middle value or midpoint).

• You can easily see the shape of a dot plot.
  

Multiple Select

What is the shape of the dot plot shown?

• u-shaped

• bell shaped

• symmetrical

Multiple Choice

How many total students were surveyed about their number of brothers and sisters? (add up all of the dots)

• 15

• 10

• 6

Multiple Choice

How many students have a shoe size bigger than 8?

• 2

• 3

• 4

• 9

Multiple Choice

What is the highest score in the class?

• 88%
• 100%
• 13
• 98%

Multiple Choice

The median is

• The middle score
•  Scores added & divided by the number of scores
• The most frequent score
• The middle when in order

Multiple Choice

What is the median of the data?

• 2

• 1

• 3

• 12

Multiple Choice

How many students received a score of 94%? 

• 94
• 4
• 1
• 2

Multiple Choice

What is the MEDIAN of this data?

• 65
• 40
• 915
• 13