sample
A sample that is invalid is also considered what?
biased
Aaron wanted to know who likes ice cream so he asked 5 people in one class. Biased or unbiased?
This is biased
Rosy wanted to know what wanted to know what was the favorite snack in the school so she asked every 5th person that walked in the cafeteria. Is this biased or unbiased?
It is biased.
A sample that data is divided into groups
Stratified sample
25 student names are written on slips of paper and placed in a basket. One name is randomly selected. Biased or unbiased?
Unbiased
Which one is unbiased
A: Lisa wanted to know what was the best flavor jolly rancher so she asked every 3 random people that bought jolly ranchers
B : Brit wanted to know how many people like sweet candy so she asked her classroom.
A
The sample where each item or person in the population is as likely to be chosen as any other.
Simple Random
John wanted to know how many people like pepperoni pizza so he asked every one that worked in Little Caesars. Biased or unbiased?
Biased
Rosy wanted to know if people liked chocolate chip cookies so she asked all the students in her homeroom class. Is this biased or unbiased?
Biased
What are two types of sample?
Biased or unbiased/random/fair
What's the difference between biased and unbiased?
Biased is a sample that is not representative of the population where unbiased is a sample that is representative of the population.
Sara wanted to know how many people like spicy chips so she sent out a survey through email to everyone in the school.
It is biased
What is the definition of a sample?
Part of a population and should be representative of the population.
What is biased?
Biased is a sample not representative of the population.
What is unbiased
Unbiased is a fair sample.