Key Terms
What is Data collection?
The process of gathering information for analysis.
All the students in the school form this group.
Population.
Picking names out of a hat is an example of what kind of sampling?
Random sampling.
Sampling saves ______?
Time
What is a sample?
A smaller group selected from a population to gather information from.
Sample
Asking every 10th person in line is what kind of sampling?
Systematic sampling.
A good sample __________ a populations traits.
Represents.
What is a population?
The entire group you're trying to learn about.
True or false: A sample can give you information about a population.
True
Asking only people near you or easy to reach is what kind of sampling?
Convenience sampling.
Tasting a spoonful of soup is like what in data collection?
Sampling.
What is variability?
The term used for ___________ between data collected from different _________.
Differences, samples
Identify the population:
50 shoppers were surveyed at the mall.
All shoppers at the mall
A sampling method where every person has an equal chance of being picked.
Random sampling
What is it called when your sample only represents one kind of person?
Bias
What is a subject?
The _______ or thing you are collecting ____ about.
Person, data.
Identify the sample:
A survey of 100 doctors was done to study medical opinions.
This type of sampling can be unfair if it doesn't represent the whole population.
Convenience sampling. (Bias)
A sample is more likely to be accurate if its selected like way.
Randomly.