Samples, populations, and Mean

Front

What is a sample?

Back

A sample is a subset of individuals or objects selected from a larger population for the purpose of conducting a survey or study.

Front

What is a population in statistics?

Back

A population is the entire group of objects or individuals considered for a survey.

Front

True or False: All samples lead to a good prediction about an entire population.

Back

False

Front

What is a random sample?

Back

A random sample is a subset of a population in which each member has an equal chance of being selected.

Front

What does it mean for a study to be unbiased?

Back

A study is unbiased if it accurately represents the population without favoritism or prejudice.

Front

What is the mean?

Back

The mean is the average of a set of numbers, calculated by adding all the values together and dividing by the number of values.

Front

Why is it important to have a representative sample?

Back

A representative sample ensures that the results of a survey or study can be generalized to the entire population.

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What is bias in sampling?

Back

Bias in sampling occurs when certain members of a population are more likely to be selected than others, leading to skewed results.

Front

Which group should Ana survey for accurate results about the tardy policy?

Back

Ana should survey thirty randomly selected students from her school.

Front

What is a biased study?

Back

A biased study is one that does not accurately reflect the population due to poor sampling methods.