Stats Notes
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Designing Samples
1
2
Betsy Greenberg
McCombs
Random Rectangles
Sampling Methods
Surprising Facts
4
Elementary Business Statistics – Designing Samples
Sampling Methods
3
Betsy Greenberg
Random Rectangles
Sampling Designs
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Surprising Facts
Sampling Designs
Random Rectangles
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
There are 100 rectangles on the page
Each rectangle has an ID number
Each rectangle is made up of one or more little squares
Betsy Greenberg
Elementary Business Statistics – Designing Samples
McCombs
Betsy Greenberg
Elementary Business Statistics – Designing Samples
McCombs
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles – Average Size
The number of squares is the size of the rectangle
Method 1
Examples:
1
rectangle #6 is size 5
Guess the average size of the rectangles on the page
2
rectangle #1 is size 1
Record your guess
rectangle #7 is size 12
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Random Rectangles
Sampling Methods
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Surprising Facts
Sampling Designs
Random Rectangles – Average Size
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Table of Random Digits
Method 2
1
Select 10 rectangles that in your judgment are representative of the rectangles on the page
2
Write down their ID numbers and sizes
3
Compute the
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Designing Samples
1
2
Betsy Greenberg
McCombs
Random Rectangles
Sampling Methods
Surprising Facts
4
Elementary Business Statistics – Designing Samples
Sampling Methods
3
Betsy Greenberg
Random Rectangles
Sampling Designs
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Surprising Facts
Sampling Designs
Random Rectangles
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
There are 100 rectangles on the page
Each rectangle has an ID number
Each rectangle is made up of one or more little squares
Betsy Greenberg
Elementary Business Statistics – Designing Samples
McCombs
Betsy Greenberg
Elementary Business Statistics – Designing Samples
McCombs
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Random Rectangles – Average Size
The number of squares is the size of the rectangle
Method 1
Examples:
1
rectangle #6 is size 5
Guess the average size of the rectangles on the page
2
rectangle #1 is size 1
Record your guess
rectangle #7 is size 12
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Random Rectangles
Sampling Methods
Betsy Greenberg
McCombs
Elementary Business Statistics – Designing Samples
Surprising Facts
Sampling Designs
Random Rectangles – Average Size
Random Rectangles
Sampling Methods
Surprising Facts
Sampling Designs
Table of Random Digits
Method 2
1
Select 10 rectangles that in your judgment are representative of the rectangles on the page
2
Write down their ID numbers and sizes
3
Compute the