Question

Match the definition with the terms.

Answer 1

1. 
1) "sample" / (a portion of a large group) ;
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2. "random sample" / (choosing a sample so that every member has an                             equal chance of being chosen).
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3. "biased sample" /
(choosing a sample from people who are under 15 years old).
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4. "estimating from a sample"/
(using the responses of a small group to make conclusions about the large group).
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Answer 2

Random sample - choosing a sample so that every member has an equal chance of being chosen (this is the absolute definition of random sampling)

Sample - a portion of a large group is termed as a sample.

Biased sample -  choosing a sample from people who are under 15 years old (biased sampling states that all the members of a group are not included in survey)  

Estimating from a sample - using the responses of a small group to make conclusions about the large group.(estimation means roughly judging something based on some sample )