Statistics

Which is an example of a statistical question?

• What is the capital of New York?

• What is your favorite sport to watch?

• What time does Samoset Middle school start?

• What was the high temperature in Ronkonkoma yesterday?

A non-statistical question...

• is a fact - has one answer

• has many answers

What does biased mean?

• fair

• unfair

What does unbiased mean?

• fair

• unfair

Every 3rd person walking out of the store

• Random

• Stratified

• Systematic

You ask 150 students at random, what their favorite class is.

• Random

• Stratified

• Systematic

You ask 100 cat owners and 100 dog owners what the best brand of pet food is.

• Random

• Stratified

• Systematic

What is another word for the mean?

• range

• mode

• median

• average

How do you find the mean?

• Order from least to greatest, cross off numbers

• the number that appears the most

• add all the numbers, then divide by the number of numbers

• Greatest # - lowest #

What is the mode?

• the average

• the middle number

• the number that appears the most